Release v2021.07.09.1 (#952)

* github actions: Create multi branch PRs to pd (#951)

.github/workflows/release.yaml

@@ -84,11 +84,15 @@ jobs:
     name: Create PD PR
     runs-on: ubuntu-latest
     needs: release
+    strategy:
+      matrix:
+        branch: [master, release-4.0, release-5.0, release-5.1]
     steps:
       - name: Check out PD code base
         uses: actions/checkout@master
         with:
           repository: tikv/pd
+          ref: ${{ matrix.branch }}
       - uses: actions/setup-go@v2
         with:
           go-version: "1.16.5"
@@ -119,24 +123,18 @@ jobs:
         if: steps.git_commit.outputs.committed == 1
         with:
           token: ${{ secrets.BOT_PAT }}
-          branch: update-tidb-dashboard/${{ needs.release.outputs.release_version }}-${{ steps.build_id.outputs.id }}
-          title: Update TiDB Dashboard to ${{ needs.release.outputs.release_version }}
+          branch: update-tidb-dashboard/${{ matrix.branch }}-${{ needs.release.outputs.release_version }}-${{ steps.build_id.outputs.id }}
+          title: Update TiDB Dashboard to ${{ needs.release.outputs.release_version }} [${{ matrix.branch }}]
           body: |
             ### What problem does this PR solve?
 
             Update TiDB Dashboard to ${{ needs.release.outputs.release_version }}.
 
             Upstream commit: https://github.com/${{ github.repository }}/commit/${{ github.sha }} .
 
-            ### Check List
-
-            Related changes
-
-            - Need to cherry-pick to the release branch
-
             ### Release note
 
             ```release-note
-            Update TiDB Dashboard to ${{ needs.release.outputs.release_version }}
+            None
             ```
           push-to-fork: tidb-dashboard-bot/pd

release-version

@@ -1,3 +1,3 @@
 # This file specifies the TiDB Dashboard internal version, which will be printed in `--version`
 # and UI. In release branch, changing this file will result in publishing a new version and tag.
-2021.07.07.1
+2021.07.09.1