[Bugfix] Fixed permission issues with the automatic PR submission workflow (#7142)

### What this PR does / why we need it?
Auto submit a pull request via
https://github.com/vllm-ascend-ci/vllm-ascend, the workflow looks like:
1. get a new config.yaml via run e2e tests
2. push the changed `config.yaml` to a new branch of
https://github.com/vllm-ascend-ci/vllm-ascend
3. submit a pull request to vllm-ascend via gh cli
### Does this PR introduce _any_ user-facing change?

### How was this patch tested?

- vLLM version: v0.16.0
- vLLM main:
4034c3d32e

---------

Signed-off-by: wangli <wangli858794774@gmail.com>

.github/workflows/schedule_update_estimated_time.yaml

@@ -14,6 +14,11 @@ permissions:
   contents: write
   pull-requests: write
 
+env:
+  UPSTREAM_REPO: vllm-project/vllm-ascend
+  FORK_OWNER: vllm-ascend-ci
+  BRANCH_NAME: auto/update-estimated-times-${{ github.run_id }}
+
 concurrency:
   group: update-estimated-times-${{ github.ref }}
   cancel-in-progress: true
@@ -23,7 +28,7 @@ jobs:
     name: e2e-test
     strategy:
       matrix:
-        vllm_version: [15d76f74e2fdb12a95ea00f0ca283acf6219a2b7]
+        vllm_version: [v0.16.0]
         type: [full, light]
     uses: ./.github/workflows/_e2e_test.yaml
     with:
@@ -38,8 +43,10 @@ jobs:
     needs: [e2e-test]
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout repo
+      - name: Checkout fork repo
         uses: actions/checkout@v6
+        with:
+          repository: ${{ env.FORK_OWNER }}/vllm-ascend
 
       - name: Download all timing artifacts
         uses: actions/download-artifact@v4
@@ -58,6 +65,13 @@ jobs:
           python -m pip install --upgrade pip
           pip install pyyaml
 
+      - name: Config git
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git remote add upstream https://github.com/${{ env.UPSTREAM_REPO }}.git
+          git fetch upstream main && git checkout -b ${{ env.BRANCH_NAME }} upstream/main
+
       - name: Update config.yaml from timing data
         run: |
           python3 .github/workflows/scripts/update_estimated_time.py \
@@ -77,35 +91,35 @@ jobs:
           fi
 
       - name: Create pull request
-        if: steps.check_changes.outputs.changed == 'true' && github.event_name != 'pull_request'
+        if: github.event_name != 'pull_request'
         env:
-          GH_TOKEN: ${{ github.token }}
+          GITHUB_TOKEN: ${{ secrets.PAT_TOKEN }}
         run: |
-          BRANCH="auto/update-estimated-times-${{ github.run_id }}"
-          git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-          git checkout -b "$BRANCH"
           git add .github/workflows/scripts/config.yaml
-          git commit -m "[CI] Auto-update estimated test times in config.yaml
-
-          Computed from timing-data artifacts of workflow run ${{ github.run_id }}.
-          Buffer ratio: 1.1x median, rounded to the nearest 10 s."
-          git push origin "$BRANCH"
+          git commit -sm "[CI] Auto-update estimated test times in config.yaml Computed from timing-data artifacts on workflow run-${{ github.run_id }}"
+          git remote -v
+          git push -f origin ${{ env.BRANCH_NAME }}:${{ env.BRANCH_NAME }}
           gh pr create \
-            --repo "${{ github.repository }}" \
+            --repo ${{ env.UPSTREAM_REPO }} \
             --base main \
-            --head "$BRANCH" \
-            --title "chore: Auto-update estimated test times in config.yaml" \
+            --head ${{ env.FORK_OWNER }}:${{ env.BRANCH_NAME }} \
+            --title "[CI]: Auto-update estimated test times in config.yaml" \
             --body "## Summary
 
-          This PR was auto-generated by the **Update estimated test times** workflow.
+          This PR was auto-generated by the **Update estimated test times** [workflow](https://github.com/${{ env.UPSTREAM_REPO }}/actions/runs/${{ github.run_id }}).
 
-          It updates the \`estimated_time\` values in \`.github/workflows/scripts/config.yaml\`
-          based on actual elapsed times collected from workflow run \`${{ github.run_id }}\`.
+          It updates the \`estimated_time\` values in \`.github/workflows/scripts/config.yaml\` based on actual elapsed times collected from CI workflow runs.
 
           ### Methodology
-          - Timing data is uploaded as \`timing-data-*\` artifacts by each e2e test job.
-          - For each test file, the **median** of all collected elapsed times is taken.
-          - A **10 % safety buffer** is applied and the result is rounded to the nearest 10 s.
 
-          Please review the diff and merge if the new values look reasonable."
+          - Each e2e test job uploads its elapsed time as a \`timing-data-*\` artifact upon completion.
+          - The workflow aggregates all collected timing artifacts across jobs.
+          - For each test, the **median** elapsed time is computed to reduce outlier impact.
+          - A **10% safety buffer** is applied and the result is rounded to the nearest 10 seconds.
+
+          ### Review Checklist
+
+          - [ ] Verify that updated \`estimated_time\` values are within a reasonable range.
+          - [ ] Confirm no test entries are missing or unexpectedly removed.
+
+          > If the new values look reasonable, feel free to merge. Otherwise, leave a comment describing the anomaly."