Update README.md

Author: Chasen-Zhang

README.md

@@ -70,7 +70,7 @@ If you have any questions or need support, please feel free to reach out via ema
 
 Happy contributing!
 
-> [!WARNING]  
+> [!IMPORTANT]   
 > **Important Notice for Contributors**  
 > If you delete a document, you **must** provide the old URL and the new URL for a 301 redirect to ensure proper navigation. Additionally, please notify @Chasen-Zhang about the change, or you can directly modify the redirect configuration in the file: [docusaurus.config.ts#L210](https://github.com/databendlabs/databend-docs/blob/main/docusaurus.config.ts#L210). Failure to do so may disrupt user access.