[BUGFIX] Typo in TypoScriptFrontendController

$this->typ needs to be $this->type

Resolves: #55753
Releases: 6.2
Change-Id: I5414de0a00b4d0b7adecd783243990397cccb0b7
Reviewed-on: https://review.typo3.org/27403
Reviewed-by: Markus Klein
Tested-by: Markus Klein