Fix GPU percentage

app.py

@@ -113,7 +113,7 @@ def get_gpu_usage():
     except subprocess.CalledProcessError:
         return "Unavailable"
     gpu_use_values = [int(x.split()[0]) for i, x in enumerate(gpu_use_info)]
-    return gpu_use_values[0] if len(gpu_use_values) > 0 else "Unavailable"
+    return f"{gpu_use_values[0]} %" if len(gpu_use_values) > 0 else "Unavailable"
 
 
 def get_usage():