Bug 577442 - POM and product version change for 4.23 release

Change-Id: I8c05ca31c5d52ac375e4c70155a3cd76e3baf378
Signed-off-by: Sravan Kumar Lakkimsetti <sravankumarl@in.ibm.com>
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.text/+/188126
11 files changed