docs(migration-guide): clarify config directory ownership requirements

Signed-off-by: 0xsysr3ll <[email protected]>

Author: 0xSysR3ll

docs/migration-guide.mdx

@@ -31,10 +31,7 @@ If you're migrating from a previous installation, you may need to update the own
 sudo chown -R 1000:1000 /path/to/appdata/config
 ```
 
-Alternatively, you can use `chmod` to grant permissions:
-```bash
-sudo chmod -R 755 /path/to/appdata/config
-```
+This ensures the `node` user (UID 1000) owns the config directory and can read and write to it.
 :::
 
 ### Unix