Docs: Update spelling for inline comments in a few files.
Per the [https://make.wordpress.org/core/handbook/best-practices/spelling/ spelling] and [https://make.wordpress.org/docs/style-guide/language-grammar/word-choice/ word choice] documentation guidelines, American (US) spelling should be preferred.
Props mohadeseghasemi, subrataemfluence, rehanali, SergeyBiryukov.
Fixes #46837.
Built from https://develop.svn.wordpress.org/trunk@52640
git-svn-id: http://core.svn.wordpress.org/trunk@52229 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2eaeae58ff