CI: Fix: Use correct name

.gitea/workflows/release-nuget-package.yml

@@ -21,10 +21,6 @@ jobs:
         run: dotnet nuget add source --name DAV --username kocoder --password ${{ secrets.REGISTRY_TOKEN_KOCODER }} https://git.kocoder.xyz/api/packages/Diplomarbeit-Absolventenverein/nuget/index.json --store-password-in-clear-text
       - name: "Build Interfaces Project"
         run: dotnet build -c PublishNuget ./Interfaces/Interfaces.csproj
-      - name: "echo and export ref_name"
-        run: echo ${{ gitea.ref_name }}
-      - name: "export ref_name"
-        run: export REF_NAME=${{ gitea.ref_name }}
       - name: "Release to Package Registry"
         run: dotnet nuget push --source DAV --api-key ${{ secrets.REGISTRY_TOKEN_KOCODER }} ./Interfaces/Interfaces.*.nupkg
       - name: "Create release"