[BUGFIX] Update ISO language db, respecting new languages

Due to merged features #103255 and #103331, the ISO language database
became outdated as the introduced languages "gd" and "mt" were unknown
before. This commit updates the language database.

Resolves: #103366
Related: #103255
Related: #103331
Releases: main
Change-Id: Ia847a5934bd9b18f1211a2dd376e1607cf1244ba
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83409


Tested-by: Andreas Kienast <a.fernandez@scripting-base.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Andreas Kienast <a.fernandez@scripting-base.de>