docs: add doc note for caBundleRef for cephobjectstore
docs: add doc note for caBundleRef for cephobjectstore

Add missed doc note for caBundleRef added as fix for issue
https://github.com/rook/rook/issues/8490

Related-Issue: https://github.com/rook/rook/issues/8490
Signed-off-by: Denis Egorenko <775ce071f93cba5d4cea8047436af7170304b9a0@mirantis.com>

rook/rook,rook/rook,rook/rook,rook/rook,rook/rook