Breaking: Adapt section names to follow recommendations

Description

Section names are recommended to be uppercase as well as partials or layout names. This is a breaking change.

If you have customized templates please ensure you check the casing of your section names after applying this patch.

Migrated section names:

• actions => Actions

• content => Content

• intro => Intro

• paginator => Paginator

Change

https://github.com/TYPO3GmbH/blog/commit/3b1fad6d194f5aacb45db3f56d17e6555e559f67