[BUGFIX] Fix wrong JS function name in RTE

RTE feature "userlinks" generates a wrong JS function
name due to the automatic replacement during the
namespace conversion.

Revert this line to use the correct JS function name.

Resolves: #59302
Releases: 6.2, 6.1, 6.0
Change-Id: Ia6b51e7e1b1dfa0e618106f4f039bd0774464a97
Reviewed-on: https://review.typo3.org/30540
Reviewed-by: Markus Klein
Tested-by: Markus Klein