Bump actions/checkout from 4 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -18,10 +18,10 @@ jobs:
         triplet: [x64-windows-webkit]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           repository: microsoft/vcpkg
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           path: WebKitRequirements
 

.github/workflows/reqcheck.yml

@@ -26,11 +26,11 @@ jobs:
             }
             return '';
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           repository: microsoft/vcpkg
           ref: ${{ steps.get-sha.outputs.result }}
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           path: WebKitRequirements