Docs: Mention workaround for escaping the slash character in selectors (#14675)
Docs: Mention workaround for escaping the slash character in selectors (#14675)

* Docs: Mention workaround for the regex escape character

* Update docs/developer-guide/selectors.md

Co-authored-by: Milos Djermanovic <09effffbacd6aa64768aaadbbc9f72e56597fccc@gmail.com>

Co-authored-by: Nicholas C. Zakas <3b9de09f2ff76afe9f0ad4fcae4ff68f52ec7fc4@humanwhocodes.com>
Co-authored-by: Milos Djermanovic <09effffbacd6aa64768aaadbbc9f72e56597fccc@gmail.com>
Trott/eslint,eslint/eslint,platinumazure/eslint,DavidAnson/eslint,eslint/eslint,platinumazure/eslint,Trott/eslint,DavidAnson/eslint