Bump actions/checkout from 3 to 4 (#548)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/build-and-test.yml

@@ -17,7 +17,7 @@ jobs:
             experimental: true
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install PHP ${{ matrix.php }}

.github/workflows/build-windows.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: windows-latest
     steps:
       - name: Checkout memcached
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup PHP
         id: setup-php
         uses: cmb69/setup-php-sdk@v0.7