Update opened-issues-triage.yml

Dropped checkout back to v1

.github/workflows/opened-issues-triage.yml

@@ -8,7 +8,7 @@ jobs:
   needs-triage:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v1
       - uses: actions-ecosystem/action-add-labels@v1
         with:
           labels: needs triage