fix: remove extraneous f-string prefixes in startup banner

server/src/wled_controller/main.py

@@ -98,10 +98,10 @@ async def lifespan(app: FastAPI):
     logger.info(f"Starting LED Grab v{__version__}")
     logger.info(f"Python version: {sys.version}")
     logger.info(f"Server listening on {config.server.host}:{config.server.port}")
-    print(f"\n  =============================================")
+    print("\n  =============================================")
     print(f"   LED Grab v{__version__}")
     print(f"   Open http://localhost:{config.server.port} in your browser")
-    print(f"  =============================================\n")
+    print("  =============================================\n")
 
     # Validate authentication configuration
     if not config.auth.api_keys: