Merge pull request #692 from release-engineering/renovate/actions-checkout-6.x

chore(deps): update actions/checkout action to v6

Author: negillett

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Set up Python 3.11
       uses: actions/setup-python@v6