docs: Mention <packing> in migration guide
authorMatthias Clasen <mclasen@redhat.com>
Fri, 4 Jun 2021 11:41:25 +0000 (07:41 -0400)
committerMatthias Clasen <mclasen@redhat.com>
Fri, 4 Jun 2021 11:42:21 +0000 (07:42 -0400)
commit312289fb1134c0bca3b439491740ec29a93de29f
treed19593ae30a16da6ddf058bd6df01fde7240eb09
parent036dd60a4ecfadecc8c8ffdc624623a081658acd
docs: Mention <packing> in migration guide

Add another hint for what to do with child properties.

Fixes: #3950
docs/reference/gtk/migrating-3to4.md