Update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/publish.yml

@@ -26,7 +26,7 @@ jobs:
       attestations: write
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: pnpm/action-setup@v5
       - uses: actions/setup-node@v6
         with: