GIT_SILENT Update version number for 21.12

3 jobs for master in 33 seconds (queued for 7 seconds)
Status Name Job ID Coverage
  Build
passed android_qt515 #170471
Linux

00:00:13

passed freebsd_qt515 #170470
FreeBSD

00:00:14

passed suse_tumbleweed_qt515 #170469
Linux

00:00:33