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/Benchmark.yml

@@ -17,7 +17,7 @@ jobs:
     #     && !contains(github.event.head_commit.message, '[skip benchmark]')
     #     && !contains(github.event.head_commit.message, '[skip benchmarks]')
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: julia-actions/setup-julia@latest
         with:
           version: 1.6

.github/workflows/docs.yml

@@ -20,7 +20,7 @@ jobs:
         !contains(github.event.head_commit.message, '[skip ci]')
         && !contains(github.event.head_commit.message, '[skip docs]')
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: julia-actions/setup-julia@v1
         with:
           version: '1'

.github/workflows/tests.yml

@@ -32,7 +32,7 @@ jobs:
           - os: macOS-latest
             version: '1'
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}