Removed multiple dotnet versions from sonarcloud, added proper projec…

…t key.

.github/workflows/sonarcloud.yml

@@ -5,17 +5,14 @@ on: [push]
 jobs:
   sonarcloud:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        dotnet-version: [6.x, 7.x, 8.x]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: ${{ matrix.dotnet-version }}
+          dotnet-version: '6.x'
       - name: Restore dependencies
         run: dotnet restore
       - name: Build