Update modus/app-manifest.mdx

Co-authored-by: Ryan Fox-Tyler <[email protected]>

Author: rderbier

modus/app-manifest.mdx

@@ -369,7 +369,7 @@ MODUS_OPENAI_API_KEY="your openai key"
 ```
 
 You should exclude `.env` files from source control. Projects created with `modus new` exclude these files
-automatically for you when creating the project.
+automatically when creating your project.
 
 ## Models