[TASK] Update CKEditor icon to meet the new CKEditor CD

This patch adds the newly added CKEditor v4 icon (via #86499)
to ext:rte_ckeditor as new extension icon.

`yarn && yarn build` was used to copy the file to the final location.

Releases: master
Resolves: #86501
Change-Id: I5225805f195eb2efe29a5deac6bb5426c313b604
Reviewed-on: https://review.typo3.org/58520


Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Jan Stockfisch <typo3@jan-stockfisch.de>
Tested-by: Jan Stockfisch <typo3@jan-stockfisch.de>
Reviewed-by: Benjamin Kott <benjamin.kott@outlook.com>
Tested-by: Benjamin Kott <benjamin.kott@outlook.com>