[BUGFIX] Correct examples for expression builder methods in changelog

->expr() must be executed on QueryBuilder, not on Connection

Releases: main
Resolves: #103829
Change-Id: Ib3af65e266fd5a467087b23a24f04c1851be3e78
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84232


Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Chris Müller <typo3@brotkrueml.dev>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Chris Müller <typo3@brotkrueml.dev>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>