[TASK] Update copyright year in README.md and INSTALL.md

Update copyright year to 2023

Resolves: #99473
Releases: main, 11.5, 10.4
Signed-off-by: Torben Hansen <derhansen@gmail.com>
Change-Id: I9fc04e75b812622c5aec89138dd7daa8ccfcd90a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77270


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>