Typo in CKEditor5 compatibility message

Problem/Motivation

There is a typo in the CKEditor 5 compatibility message shown during module requirements check: 'compatiblity' rather than 'compatibility'.

Steps to reproduce

There are various ways this can be reproduced, but it may often arise during the upgrade process to Drupal 10+, which requires CKEditor 5 and so triggers this message being shown.

Proposed resolution

A simple fix in code.

Remaining tasks

Patch to be created and peer-reviewed.

User interface changes

'compatiblity' changed to 'compatibility' in the REQUIREMENT_ERROR message shown when CKEditor 5 compatibility requirements are not met.

API changes

None.

Data model changes

None.