Don't build release tags.

2 jobs for master in 3 minutes and 49 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Deploy
failed #278406
pages

00:03:49

failed #227499
pages

00:04:23

 
Name Stage Failure
failed
pages Deploy
   Last modification reported: Thu, 17 Jan 2019 19:54:43 +0000
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
autopkgtest [23:57:10]: ERROR: testbed failure: apt repeatedly failed to download packages
autopkgtest [23:57:10]: Binaries: resetting testbed apt configuration
Hit:1 http://deb.debian.org/debian testing InRelease
Hit:2 http://deb.debian.org/debian sid InRelease
Hit:3 http://deb.debian.org/debian experimental InRelease
Reading package lists...
ERROR: Job failed: exit code 1