[BUGFIX] Add missing quotation mark in PM_ATagWrap

Resolves: #72453
Releases: master,7.6
Change-Id: I3288422634a1db41b3370c5f2d1d894e0b6fd8c5
Reviewed-on: https://review.typo3.org/45467


Reviewed-by: Tim Lochmüller <tim@fruit-lab.de>
Tested-by: Tim Lochmüller <tim@fruit-lab.de>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>