Merge pull request #2114 from microsoftgraph/dependabot/github_actions/actions/checkout-4.0.0

Bump actions/checkout from 3.6.0 to 4.0.0

Author: andrueastman

.github/workflows/validatePullRequest.yml

@@ -13,7 +13,7 @@ jobs:
     env:
       solutionName: Microsoft.Graph.sln
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - name: Setup .NET
         uses: actions/setup-dotnet@v3.2.0
         with: