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

Author: renovate[bot]

.github/workflows/grit_check.yml

@@ -13,6 +13,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
       - name: grit-check
         uses: getgrit/github-action-check@v0

.github/workflows/pull_request.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
       - name: Setup Biome
         uses: biomejs/setup-biome@v2
         with:

.github/workflows/review.yml

@@ -8,7 +8,7 @@ jobs:
       contents: read
       pull-requests: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: mongolyy/reviewdog-action-biome@v1
         with:
           github_token: ${{ secrets.github_token }}