Change some comments to conform to the style used in other comments

[sharang-d]

Summary

I went through #33770 (by @eileencodes) and I found some things I thought I could make consistent with the rest of the code in the repository. Here's my attempt to do that :)
(also fixes a small typo)

[rails-bot]

Thanks for the pull request, and welcome! The Rails team is excited to review your changes, and you should hear from @pixeltrix (or someone else) soon.

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[sharang-d]

I didn't push with [ci skip] the first time so if anyone could cancel the extra build that'd be great. Sorry for the extra work!

[sharang-d]

Thanks!