[TASK] Mention PSR-3 Logger compatibility in News.txt

Resolves: #49661
Releases: 6.2
Change-Id: I2013fb9d05cb7f9699825ecaf154075792461ed1
Reviewed-on: https://review.typo3.org/21876
Reviewed-by: Markus Klein
Tested-by: Markus Klein
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn