Update DEVELOPER.md

Author: twishabansal

DEVELOPER.md

@@ -62,6 +62,10 @@ The skills themselves are validated using the `skills-validate.yml` workflow.
 *   **Dependency Updates:** [Renovate](https://github.com/apps/forking-renovate)
     is configured to automatically create pull requests for dependency updates.
 
+## Building the extension
+
+The building process for this extension is handled automatically by the
+automated workflows when a new release is created. Manual building is not required.
 
 ## Maintainer Information