[v0.18.0][Bugfix] Fix pr triggers on branches for nightly test workflows (#7695)

### What this PR does / why we need it?
1. Allow PR triggers on `*-dev` and `releases/v*` branches for nightly
test workflows.
2.  fix image-tag in doc

---------

Signed-off-by: hfadzxy <starmoon_zhang@163.com>

.github/workflows/schedule_nightly_test_a3.yaml

@@ -28,6 +28,8 @@ on:
   pull_request:
     branches:
       - 'main'
+      - '*-dev'
+      - 'releases/v*'
     types: [ labeled, synchronize ]
 
 permissions: