fix lint

Author: TC-MO

sources/platform/actors/development/actor_definition/docker.md

@@ -217,4 +217,4 @@ USER myuser
 # ... your other instructions
 ```
 
-If your Actor needs to run as `root` for a specific reason, you can add the `USER root` instruction after `FROM`. However, for a majority of Actors, this is not necessary.
+If your Actor needs to run as `root` for a specific reason, you can add the `USER root` instruction after `FROM`. However, for a majority of Actors, this is not necessary.