chore: update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
           - 22
     runs-on: ${{ matrix.platform }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}