Fixed typo
Merge pull request #5586 from antonanisimov/patch-2

Fixed typo
Fixed typos
Merge pull request #5588 from antonanisimov/patch-3

[skip ci] Fixed typos
added more markdown tags to docs/internals/versions.md for better readability
Merge pull request #5594 from softark/versions-md-update

[skip ci] added more markdown tags to versions.md for better readability
use 'ON DELETE SET NULL' instead of 'ON DELETE CASCADE'
changelog
changelog
Fixes #5584: `yii\rbac\DbRbacManager` should not delete items when deleting a rule on a database not supporting cascade update
Fixes #5600: Allow configuring debug panels in `yii\debug\Module::panels` as panel class name strings