Workflow benchmark-pull-request.yml fix (#16925)

Signed-off-by: Prudhvi Godithi <[email protected]>

.github/workflows/benchmark-pull-request.yml

@@ -4,7 +4,10 @@ on:
     types: [created]
 jobs:
   run-performance-benchmark-on-pull-request:
-    if: ${{ (github.event.issue.pull_request) && (contains(github.event.comment.body, '"run-benchmark-test"')) }}
+    if: |
+      github.repository == 'opensearch-project/OpenSearch' &&
+      github.event.issue.pull_request &&
+      contains(github.event.comment.body, '"run-benchmark-test"')
     runs-on: ubuntu-latest
     permissions:
       id-token: write
@@ -111,7 +114,7 @@ jobs:
         uses: actions/github-script@v7
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
-          result-encoding: string
+          result-encoding: json
           script: |
             // Get the collaborators - filtered to maintainer permissions
             const maintainersResponse = await github.request('GET /repos/{owner}/{repo}/collaborators', {
@@ -121,12 +124,12 @@ jobs:
               affiliation: 'all',
               per_page: 100
               });
-            return maintainersResponse.data.map(item => item.login).join(', ');
+            return maintainersResponse.data.map(item => item.login);
       - uses: trstringer/manual-approval@v1
-        if: (!contains(steps.get_approvers.outputs.result, github.event.comment.user.login))
+        if: ${{ !contains(fromJSON(steps.get_approvers.outputs.result), github.event.comment.user.login) }}
         with:
           secret: ${{ github.TOKEN }}
-          approvers: ${{ steps.get_approvers.outputs.result }}
+          approvers: ${{ join(fromJSON(steps.get_approvers.outputs.result), ', ') }}
           minimum-approvals: 1
           issue-title: 'Request to approve/deny benchmark run for PR #${{ env.PR_NUMBER }}'
           issue-body: "Please approve or deny the benchmark run for PR #${{ env.PR_NUMBER }}"