don't report every unstable TTCN3 build

This saves deleting >= 80 e-mails every day.

Closes: OS#5841
Change-Id: I9593a3c3a94ab3f66ed4cd92906e7428a9d04bf5

jobs/ttcn3-testsuites-kernel-git.yml

@@ -105,7 +105,7 @@
           results: '**/junit-xml-*.log'
           allow-empty-results: false
       - email:
-          notify-every-unstable-build: true
+          notify-every-unstable-build: false
           recipients: laforge@gnumonks.org osmith@sysmocom.de
           send-to-individuals: false
       - archive:

jobs/ttcn3-testsuites.yml

@@ -477,7 +477,7 @@
           results: '**/junit-xml-*.log'
           allow-empty-results: false
       - email:
-          notify-every-unstable-build: true
+          notify-every-unstable-build: false
           recipients: '{obj:email}'
           send-to-individuals: false
       - archive: