build: update mergify for the release-1.10 branch
build: update mergify for the release-1.10 branch

Configure the mergify bot to open backport PRs for the
1.10 release branch if PRs are labeled as such.

Signed-off-by: Travis Nielsen <a8b474fdb3f77f44446f0ab9ddca8147b09b3a9e@redhat.com>

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