CI: Setup dotnet SDK before running automatic build

.gitea/workflows/ci.yml

@@ -38,10 +38,10 @@ jobs:
       run: dotnet build ./Module.EventRegistration/SZUAbsolventenverein.Module.EventRegistration.sln --configuration Release
     - name: Test
       run: dotnet test ./Module.EventRegistration/SZUAbsolventenverein.Module.EventRegistration.sln --configuration Release --no-build
-    - name: Create Release
-      uses: https://gitea.com/actions/release-action
+    - name: Upload Artifacts
+      uses: https://github.com/actions/upload-artifact@v4
       with:
-        name: ${{ GITEA.COMMIT_SHA }}
+        name: nuget
         if-no-files-found: error
         retention-days: 7
         path: |