[DOCS] Add `editor.config.debug` to rte_ckeditor config reference

Resolves: #100868
Resolves: https://github.com/TYPO3-Documentation/Changelog-To-Doc/issues/430
Releases: main, 12.4
Change-Id: I12e8b1fe6b627c48bd5af1acc8e6d8ee451c5fb8
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79022


Reviewed-by: Simon Schaufelberger <simonschaufi+typo3@gmail.com>
Tested-by: Chris Müller <typo3@krue.ml>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Chris Müller <typo3@krue.ml>
Tested-by: Simon Schaufelberger <simonschaufi+typo3@gmail.com>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: core-ci <typo3@b13.com>