Uses newer GHA for .NET to avoid node 20 which EOL CTR

Author: spmallette

.github/workflows/build-test.yml

@@ -308,7 +308,7 @@ jobs:
           java-version: '11'
           distribution: 'temurin'
       - name: Set up .NET 8.0.x
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: '8.0.x'
       - name: Get Cached Server Base Image