korrigeret ci config

.gitea/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
         run: dotnet publish HuntingAppApi.csproj --configuration Release --no-build --output ./artifacts/huntapi
 
       - name: Upload published API
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: huntapi
           path: ./artifacts/huntapi

docs/gitea-actions-setup.md

@@ -41,6 +41,9 @@ the build uses `nuget.org` instead of machine-specific package feeds.
 The runner must be able to reach `github.com`/`gitea.com` for actions and
 `api.nuget.org` for packages unless you configure a local action/package mirror.
 
+Gitea Actions currently treats `actions/upload-artifact@v4` as unsupported in
+this environment, so the workflow intentionally uses `actions/upload-artifact@v3`.
+
 ## First push
 
 The local repository currently needs its first commit and a `master` branch for