Bump actions/checkout from 6 to 7 (#749)

Author: dependabot[bot]

.github/workflows/check.yml

@@ -17,7 +17,7 @@ jobs:
         python-version:
           - '3.13'
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           persist-credentials: false
       - name: Setup Python