Add info to review all "migrating customization" topics (#254)
Add info to review all "migrating customization" topics (#254)

Signed-off-by: Lief Erickson <69ccd9cabf5c0b4ddce1a4a171d2d0d6299882c4@gmail.com>
infotexture/docs,dita-ot/docs,infotexture/docs