Bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...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.yml

@@ -21,7 +21,7 @@ jobs:
     build-macos:
         runs-on: macos-latest
         steps:
-        - uses: actions/checkout@v6
+        - uses: actions/checkout@v7
         - uses: actions/setup-python@v6
           with:
             python-version: "3.12"
@@ -118,7 +118,7 @@ jobs:
     build-windows:
         runs-on: windows-latest
         steps:
-        - uses: actions/checkout@v6
+        - uses: actions/checkout@v7
         - uses: actions/setup-python@v6
           with:
             python-version: "3.12"
@@ -198,7 +198,7 @@ jobs:
     build-linux:
         runs-on: ubuntu-latest
         steps:
-        - uses: actions/checkout@v6
+        - uses: actions/checkout@v7
         - uses: actions/setup-python@v6
           with:
             python-version: "3.12"