fix(infra): add checkout step to pr-labeler workflow and fix config path

Author: 20ns

.github/workflows/pr_labeler_title.yml

@@ -20,9 +20,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+      
     - name: Label PR based on title
       # Archived repo; latest commit (v0.1.0)
       uses: grafana/pr-labeler-action@f19222d3ef883d2ca5f04420fdfe8148003763f0
       with:
         token: ${{ secrets.GITHUB_TOKEN }}
-        configuration-path: .github/pr-labeler.yml
+        configuration-path: .github/pr-title-labeler.yml