chore(deps): update actions/checkout action to v4 (#529)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/deploy_gh-pages.yml

@@ -14,7 +14,7 @@ jobs:
         with:
           access_token: ${{ secrets.GITHUB_TOKEN }}
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Use Node.js 16.x
         uses: actions/setup-node@v3

.github/workflows/pull-request.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Use Node.js 16.x
         uses: actions/setup-node@v3