[Backport 2.x] Adds opensearch trigger bot to discerning merger list …

…to allow automatic merges (#3474) (#3482)

Adds OpenSearch trigger bot to discerning merger list to allow automatic merges (#3474) (#3482)

Signed-off-by: Darshit Chanpura <dchanp@amazon.com>
(cherry picked from commit 999339e)

.github/workflows/automatic-merges.yml

@@ -25,7 +25,8 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
           pull-request-number: ${{ steps.find-triggering-pr.outputs.pr-number }}
           allowed-authors: |
-            dependabot%5Bbot%5D
+            dependabot[bot]
+            opensearch-trigger-bot[bot]
           allowed-files: |
             build.gradle
             .github/workflows/*.yml