fix: add missing actions/checkout to issue-ops workflow

Author: FidelusAleksander

.github/workflows/issue-ops.yml

@@ -15,6 +15,8 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - uses: actions/checkout@v4
+      
       - name: Get active step workflow
         id: step-info
         uses: skills/exercise-toolkit/actions/active-step-workflow@get-current-step-action