remove ' ' around 0.0.0.0

Signed-off-by: apple muncy <[email protected]>

app.py

@@ -33,5 +33,5 @@ def review_code(code: str) -> str:
 
 if __name__=="__main__":
     mcp.run(transport="streamable-http",
-        host='0.0.0.0',
+        host=0.0.0.0,
             )