Clean up remaining writing-quality issues from the audit (E1, E3, E4, E7)

Co-Authored-By: Claude Sonnet 5 <[email protected]>

content/en/3.serveex/5.media/1.jellyfin.md

@@ -44,7 +44,7 @@ tree:
 Create the `movies`, `tvseries`, and `library` folders in `/media`:
 
 ```bash [Terminal]
-mkdir -p /media/movies /media/library /media/tvseries
+mkdir -p /media/movies /media/tvseries /media/library
 ```
 
 ### Deploy the stack