chore: add GH Action, on Snyk PRs commit yarn.lock (#9534)

.github/workflows/snyk-yarn-lock-commit.yml

@@ -0,0 +1,29 @@
+name: Update Snyk PR to add yarn.lock
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  update-snyk-pr:
+    if: contains(github.event.pull_request.title.toLowerCase(), '[snyk]')
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v3
+        with:
+          ref: ${{ github.head_ref }}
+          token: ${{ secrets.GITHUB_TOKEN }}  # This token is provided by Actions, no need to create one
+
+      - name: Install dependencies
+        run: yarn install
+
+      - name: Commit yarn.lock to the PR branch
+        run: |
+          git config --global user.email "action@github.com"
+          git config --global user.name "GitHub Action"
+          git add yarn.lock
+          git commit -m "Update yarn.lock" || echo "No changes to commit"
+          git push
+