[DOCS] Update TypoLink example inside of ViewHelper

Since TYPO3 8 the way TypoLinks are represented has changed.
The new form is t3://page?uid= as prefix for page links.
The documentation of TypoLinkViewHelper is updated to reflect this.

Resolves: #89408
Releases: master, 9.5

Change-Id: I093c3db171163cff9de3a02a715784241724a2c1
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61968


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Steffen Frese <steffenf14@gmail.com>
Tested-by: Felix P. <f.pachowsky@neusta.de>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Steffen Frese <steffenf14@gmail.com>
Reviewed-by: Felix P. <f.pachowsky@neusta.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>