[BUGFIX] Rebuild redirect cache after changing slug

If a slug is changed, the redirect cache must be rebuilt to make
the redirect actually work.

Resolves: #94808
Releases: master, 10.4
Change-Id: Ieb3615db1829aa45eb14d6a7baaeed183a70b248
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70461


Tested-by: Tim Schreiner <schreiner.tim@gmail.com>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Tim Schreiner <schreiner.tim@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>