Merge pull request #6 from gf712/renovate/actions-checkout-6.x

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

Author: gf712

.github/workflows/premerge.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - uses: actions/setup-python@v3