Upgrade GitHub Actions to v5 in dotnetcore.yml

Co-authored-by: keegan-caruso <[email protected]>

Author: Copilot

.github/workflows/dotnetcore.yml

@@ -9,9 +9,9 @@ jobs:
     name: Abstractions GitHub Action Test
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4.1.7     
+      uses: actions/checkout@v5     
     - name: Setup .NET 8.0.x
-      uses: actions/setup-dotnet@v4
+      uses: actions/setup-dotnet@v5
       with:
         dotnet-version: 8.0.x
 
@@ -20,7 +20,7 @@ jobs:
       run: dotnet test -v m --configuration Release Microsoft.Identity.Abstractions.sln
 
     - name: Setup .NET 10.0.100-rc.1
-      uses: actions/setup-dotnet@v4
+      uses: actions/setup-dotnet@v5
       with:
         dotnet-version: 10.0.100-rc.1.25451.107