[DOCS] Use correct middleware name 'typo3/cms-frontend/authentication'

Use the correct middleware name 'typo3/cms-frontend/authentication' in
the changelog instead of referring to a non-existing name.

Releases: main, 11.5, 10.4
Resolves: #97660
Change-Id: I5ebb586689f3173e1cc2a06049fd4b4d40430972
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74693


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>