[skip-release] Update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/lint-test.yml

@@ -4,7 +4,7 @@ jobs:
   lint:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
 
       - run: shellcheck **/*.sh