chore: fix dotnet.yml workflow to use .NET 8 SDK

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: codebytes

.github/workflows/dotnet.yml

@@ -12,14 +12,15 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v6
     - name: Setup .NET
-      uses: actions/setup-dotnet@v1
+      uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: 5.0.x
+        dotnet-version: '8.0.x'
     - name: Restore dependencies
       run: dotnet restore
     - name: Build
       run: dotnet build --no-restore
     - name: Test
       run: dotnet test --no-build --verbosity normal
+