Apply suggestions from code review

Co-authored-by: Frédéric Collonval <[email protected]>

Author: jtpio

main-menu/README.md

@@ -85,7 +85,7 @@ After the execution of that command, `package.json` should list them in the
 `dependencies`:
 
 ```json5
-// package.json#L44-L48
+// package.json#L46-L50
 
   "watch:src": "tsc -w"
 },

settings/README.md

@@ -109,7 +109,7 @@ the `package.json` file in the `jupyterlab` section (here `schema`):
 
 <!-- prettier-ignore-start -->
 ```json5
-// package.json#L68-L70
+// package.json#L70-L74
 
   "style/*.css"
 ],