[CI] Nightly tests use releases/v0.13.0 (#6355)

### What this PR does / why we need it?
The pre-requirement pr is
https://github.com/vllm-project/vllm-ascend/pull/6353, this patch aims
to transfer nightly tests to `releases/v0.13.0`, what we need to do is
just use the branch built image for nightly

- vLLM version: v0.14.1
- vLLM main:
dc917cceb8

---------

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

.github/workflows/schedule_nightly_image_build.yaml

@@ -22,6 +22,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+          ref: releases/v0.13.0
 
       - name: Show build target
         run: |