docs: fix warn/caution aside in deep link guide

src/content/docs/plugin/deep-linking.mdx

@@ -188,7 +188,7 @@ pub fn run() {
 }
 ```
 
-:::warn
+:::caution
 The user could trigger a fake deep link manually by including the URL as argument.
 Tauri matches the command line argument against the configured schemes to mitigate this,
 but you should still check if the URL matches the format you expect.