Fix: Tabs seem to be illegal

Author: 01Parzival10

.github/workflows/backendUpdatesite.yml

@@ -26,7 +26,7 @@ jobs:
         with:
           maven-version: 3.9.6
       - name: Build and Verify
- 	working-directory: Backend/AnalysisBackendServer
+        working-directory: Backend/AnalysisBackendServer
         run: mvn clean verify
       - name: Publish Nightly Update Site
         if: github.event_name != 'release' && github.ref == 'refs/heads/main' && github.repository_owner == 'DataFlowAnalysis'