chore(deps): update actions/checkout action to v7

Author: renovate[bot]

action.yaml

@@ -30,7 +30,7 @@ runs:
   using: composite
   steps:
     - name: Checkout
-      uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6.1.0
+      uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       with:
         token: ${{ inputs.github_token }}
         # In pull_request_target, use the base repo's synthetic merge ref to avoid cross-repo clones