Bump actions/checkout from 5 to 6 (#1234)

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [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/v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  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/c-cpp-Windows.yml

@@ -19,7 +19,7 @@ jobs:
           - windows-2022
     runs-on: ${{ matrix.target }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: install Windows libraries
       run: vcpkg install pcre2:x64-windows && c:\msys64\usr\bin\pacman.exe -S --noconfirm mingw-w64-x86_64-pcre2 mingw-w64-x86_64-openssl
     - name: make Windows