chore: update actions/add-to-project digest to 8a84a85

Author: renovate[bot]

.github/workflows/ADD_TO_HTO_PROJECT.yml

@@ -14,7 +14,7 @@ jobs:
     name: Add issue to project
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/add-to-project@5b1a254a3546aef88e0a7724a77a623fa2e47c36
+      - uses: actions/add-to-project@8a84a858ead1a8775386f50be595a438772c2879
         name: Add to project
         id: add-project
         with: