🐛 Fix builds by using correct .NET version (#84)

Author: tomrijnbeek

.github/workflows/dotnet-build.yml

@@ -18,7 +18,7 @@ jobs:
         uses: actions/setup-dotnet@v3.0.0
         with:
           dotnet-version: |
-            6.0.x
+            8.0.x
       - name: Install dependencies
         run: dotnet restore
       - name: Build

.github/workflows/dotnet-publish.yml

@@ -18,7 +18,7 @@ jobs:
         uses: actions/setup-dotnet@v3.0.0
         with:
           dotnet-version: |
-            6.0.x
+            8.0.x
       - name: Install dependencies
         run: dotnet restore
       - name: Build