chore(deps): bump actions/checkout from 4.1.5 to 4.1.6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.1.5 to 4.1.6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4.1.5...v4.1.6)

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

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

Author: dependabot[bot]

.github/workflows/validatePullRequest.yml

@@ -20,7 +20,7 @@ jobs:
       solutionName: Microsoft.Graph.Core.sln
       relativePath: ./src/Microsoft.Graph.Core
     steps:
-      - uses: actions/checkout@v4.1.5
+      - uses: actions/checkout@v4.1.6
 
       - name: Setup .NET
         uses: actions/setup-dotnet@v4