Clarify case-insensitivity for code search

[jsoref]

Code of Conduct

• [X] I have read and agree to the GitHub Docs project's Code of Conduct

What article on docs.github.com is affected?

https://docs.github.com/en/search-github/github-code-search/understanding-github-code-search-syntax

What part(s) of the article would you like to see updated?

Add a section explaining that code search is case-insensitive. Using enough SEO words to ensure that people looking for uppercase, lowercase, and similar find the block explaining this.

Additional information

https://github.com/orgs/community/discussions/106798

[nguyenalex836]

@jsoref Thank you for raising this issue! I'll get this triaged for review ✨ Our team will provide feedback regarding the best next steps for this issue - thanks for your patience! 💛

[nguyenalex836]

@jsoref We appreciate your patience while our team discussed this internally 💛 The team would welcome a section explaining case-insensitivity to the docs. You, or anyone else is welcome to submit a PR adding this section ✨

[gsosm0760]

Emeğinize sağlık