[Backport testmain2] [TEST BACKPORT] TEST ONLY (#6885)

.github/workflows/123

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+123

.github/workflows/automerge-backport.yml

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+name: automerge backport
+on:
+  pull_request:
+    types:
+      - labeled
+      - unlabeled
+      - synchronize
+      - opened
+      - edited
+      - ready_for_review
+      - reopened
+      - unlocked
+  pull_request_review:
+    types:
+      - submitted
+  check_suite:
+    types:
+      - completed
+  status: {}
+jobs:
+  automerge-backport:
+    if: github.repository == 'opensearch-project/documentation-website' 
+    runs-on: ubuntu-latest
+    steps:
+      - name: Wait some time so that label and approval is up
+        run: sleep 30
+      - id: automerge
+        name: automerge
+        uses: "pascalgn/[email protected]"
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+          MERGE_LABELS: "backport-automerge,!On hold"
+          MERGE_FILTER_AUTHOR: "opensearch-trigger-bot[bot]"
+          MERGE_REQUIRED_APPROVALS: "1"
+          MERGE_RETRIES: "20"
+          MERGE_RETRY_SLEEP: "10000"
+          MERGE_ERROR_FAIL: "true"
+          MERGE_FORKS: "false"
+          MERGE_METHOD: "squash"
+          MERGE_DELETE_BRANCH: "true"