[DOCS] Fix rendering warning in changelog

Rendering the changelog with the PHP-based rendering the following warning is thrown:

The code-block has no content. Did you properly indent the code?
{"rst-file":"Changelog/7.5/Feature-68166-RenderTypeForRsaEncryptedInputFields.rst","currentLineNumber":29}

Additionally, typos in another changelog have been fixed.

Resolves: #103324
Releases: main, 12.4
Change-Id: I9efd66834a18f4a0b94feb7f1f2c776ff0fb260f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83309


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>