Use autoupdate github action to auto update all PRs. (#2958)

* Use autoupdate github action to auto update all PRs.

* Potential fix for code scanning alert no. 100: Workflow does not contain permissions

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

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Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
Co-authored-by: Jakub Hrozek <[email protected]>

Author: 3 people

.github/workflows/autoupdate.yml

@@ -0,0 +1,17 @@
+name: autoupdate
+permissions:
+  contents: read
+  pull-requests: write
+on:
+  # Update all PRs on merge to main
+  push:
+    branches:
+      - main
+jobs:
+  autoupdate:
+    name: autoupdate
+    runs-on: ubuntu-latest
+    steps:
+      - uses: docker://chinthakagodawita/autoupdate-action:v1
+        env:
+          GITHUB_TOKEN: '${{ secrets.GITHUB_TOKEN }}'