[infra] Automation: Add release PR reviewers (#12982)

Signed-off-by: Michel Engelen <[email protected]>
Co-authored-by: Jose C Quintas Jr <[email protected]>

.github/workflows/add-release-reviewers.yml

@@ -0,0 +1,37 @@
+name: Add reviewers to release PRs
+
+on:
+  pull_request_target:
+    branches: ['master', 'next']
+    types: ['labeled']
+
+permissions: {}
+
+jobs:
+  add-reviewers:
+    if: ${{ github.event.label.name == 'release' }}
+    # Tests that label is added on the PR
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - id: get-members
+        uses: garnertb/get-team-members@0482f68c88601800f85145570ea93bf8fcfcf46f
+        with:
+          org: mui
+          team_slug: x
+          role: maintainer
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      # assign reviewers
+      - name: Add reviewer
+        run: |
+          curl -L \
+          -X POST \
+          -H "Accept: application/vnd.github+json" \
+          -H "Authorization: Bearer <YOUR-TOKEN>" \
+          -H "X-GitHub-Api-Version: 2022-11-28" \
+          /repos/${{ github.repository }}/pulls/${{ github.event.pull_request.number }}/requested_reviewers \
+          -d '{"reviewers":[${{ steps.get-members.outputs.members }}]}' \
+        env:
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}