fix(docs): correct typos in comments and strings found during code view (#5880)

Non-functional changes only:
- Fixed minor spelling mistakes in comments
- Corrected typos in user-facing strings
- No variables, logic, or functional code was modified.

Signed-off-by: Marcel Petrick <mail@marcelpetrick.it>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5880-fix-docs-correct-typos-in-comments-and-strings-found-during-code-view-27f6d73d3650815db62af6115991304a)
by [Unito](https://www.unito.io)

---------

Signed-off-by: Marcel Petrick <mail@marcelpetrick.it>
Co-authored-by: Alexander Brown <DrJKL0424@gmail.com>
Co-authored-by: Benjamin Lu <benjaminlu1107@gmail.com>

src/platform/updates/components/WhatsNewPopup.vue

@@ -195,7 +195,7 @@ defineExpose({
   bottom: calc(
     var(--sidebar-width) * 2 + var(--sidebar-icon-size) / 2 -
       var(--whats-new-popup-bottom)
-  ); /* Position to center of help center icon (2 icons below + half icon height for center - whats new popup bottom position ) */
+  ); /* Position to center of help center icon (2 icons below + half icon height for center - what's new popup bottom position ) */
 }
 
 /* Sidebar positioning classes applied by parent */