Twenty Twenty-One: Fix typos in some inline comments

[manzurahammed]

Fixed some spelling issue in Twenty Twenty-One theme

[mukesh27]

Hi there!

Thank you for the patch.

Twenty Twenty-One uses SCSS so the code needs to be updated in the scss file and then be
compiled to update the style.css file, the RTL style, and the style for Internet Explorer.

The instructions for how to do this are limited, let me know if I can clarify them:
​https://github.com/WordPress/twentytwentyone/blob/trunk/CONTRIBUTING.md#getting-started-with-development

52071.patch​ need update so add needs-refresh tag

[SergeyBiryukov]

In 49801:

Twenty Twenty-One: Fix typos in some inline comments.

Props manzurahammed, mukesh27.
Fixes #52071.

[SergeyBiryukov]

Reopening for backporting to the 5.6 branch.

[desrosj]

In 49817:

Twenty Twenty-One: Fix typos in some inline comments.

Props manzurahammed, mukesh27.
Merges [49801] to the 5.6 branch.
Fixes #52071.

[desrosj]

Adding a custom keyword for querying tickets included in the Twenty Twenty-One version 1.1 release in the future.