[BUGFIX] Follow-up typo to #45316

One namespace change was missing.

Change-Id: Ia10af0e7d336ea7ff423a1974d30892a5b4d1b61
Related: #45316
Releases: 6.1
Reviewed-on: https://review.typo3.org/18167
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn