Add info on dita-ot/dita-ot#2549 to 2.4.6 RN
Add info on dita-ot/dita-ot#2549 to 2.4.6 RN

Signed-off-by: Roger Sheen <a61a1add71dadc74037ae5e44ee30713db9a7451@infotexture.net>

dita-ot/docs,shaneataylor/docs,shaneataylor/docs,infotexture/docs,infotexture/docs