CI: Setup dotnet SDK before running automatic build

.gitea/workflows/ci.yml

@@ -38,13 +38,12 @@ 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: akkuman/gitea-release-action@v1
-      env:
-        NODE_OPTIONS: '--experimental-fetch' # if nodejs < 18
+    - name: Upload Artifacts
+      uses: https://github.com/actions/upload-artifact@v4
       with:
-        body: "Test-release"
-        draft: true
-        files: |-
-          ./**/*.nupkg
-          ./*.nupkg
+        name: nuget
+        if-no-files-found: error
+        retention-days: 7
+        path: |
+          ./*.nupkg
+          ./**/*.nupkg