policy: add missing local range 100.64.0.0/10

Thanks to Petr for finding this issue.
5 jobs for local-ip-update in 46 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
canceled build:linux:amd64 #72919
amd64 linux docker

00:00:11

passed build:linux:amd64 #11705
docker linux amd64

00:00:34

 
  Test
passed deckard:linux:amd64 #11707
docker linux amd64

00:00:34

canceled respdiff:linux:amd64 #11708
docker linux amd64 allowed to fail

00:00:05

passed test:linux:amd64 #11706
docker linux amd64

00:00:29