Update add_to_project.yml

.github/workflows/add_to_project.yml

@@ -7,6 +7,20 @@ on:
       - transferred
 
 jobs:
+  cleanup_old_runs:
+      runs-on: ubuntu-20.04
+      permissions:
+        actions: write
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      steps:
+      - name: Delete old workflow runs
+        run: |
+          _UrlPath="/repos/$GITHUB_REPOSITORY/actions/workflows"
+          _CurrentWorkflowID="$(gh api -X GET "$_UrlPath" | jq '.workflows[] | select(.name == '\""$GITHUB_WORKFLOW"\"') | .id')"
+          gh api -X GET "$_UrlPath/$_CurrentWorkflowID/runs" --paginate \
+            | jq '.workflow_runs[] | select(.status == "completed") | .id' \
+            | xargs -I{} gh api -X DELETE "/repos/$GITHUB_REPOSITORY/actions/runs"/{}
   add-to-project:
     name: Add issue to project
     runs-on: ubuntu-latest