fix: add checkout step to the add job in CI workflow

Agent-Logs-Url: https://github.com/githubnext/agentic-ops/sessions/85680ec2-07f6-4c83-8726-9f1a354e63eb

Co-authored-by: mnkiefer <8320933+mnkiefer@users.noreply.github.com>

Author: Copilot

.github/workflows/ci.yml

@@ -24,6 +24,8 @@ jobs:
   add:
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+
       - name: Set up gh-aw CLI
         uses: github/gh-aw-actions/setup-cli@f8495a686e66770ae977f82732f34d7340ee42a4 # v0.71.4
         with: