[DOCS] Update v6.22 release notes
[DOCS] Update v6.22 release notes

Co-authored-by: Stephan Hageboeck <4db7e0e579e9b6a6dd6449b1d334cf5749aaf6de@cern.ch>

karies/root,karies/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root,karies/root,karies/root,karies/root,karies/root,olifre/root,root-mirror/root,olifre/root,olifre/root,olifre/root,karies/root,root-mirror/root,olifre/root,karies/root,olifre/root,olifre/root,karies/root,root-mirror/root,karies/root,root-mirror/root,karies/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root