Update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/build.yml

@@ -7,7 +7,7 @@ jobs:
     name: Build Content
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: codespell-project/actions-codespell@v2
         with:
           check_hidden: true

.github/workflows/deploy.yml

@@ -18,7 +18,7 @@ jobs:
     name: Deploy to GitHub Pages
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           ref: ${{ inputs.branch || 'main' }}
       - uses: actions/setup-node@v6