[TASK] Use h2 for card title of element information modal

Resolves: #104060
Related: #104046
Releases: main, 12.4
Change-Id: I2b7b8c8911cd3f5552a287a73942c11806f4b8bd
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84634


Tested-by: core-ci <typo3@b13.com>
Tested-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Reviewed-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>