[BUGFIX] Make filtered upgrade docs visible again

When resetting the tag filter in "View Upgrade Documentation", the
`hidden` class now gets removed, making previously filtered upgrade docs
visible again.

Resolves: #101771
Releases: main, 12.4
Change-Id: Ie8bc14cc20fed803ae9644308eeb7cf2daa15a09
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/80713


Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Benjamin Franzke <ben@bnf.dev>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Thomas Hohn <tho@gyldendal.dk>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Benjamin Franzke <ben@bnf.dev>
Tested-by: core-ci <typo3@b13.com>