Run updates on debian/*-{security,updates} branches as well

Allow to trigger the update pipeline on branches like debian/buster-security, not just debian/buster. This should handle corner cases where a package got imported from buster-security and lacks a debian/buster branch.

The apertis-pkg-pull-updates script always looks at all the related suites at the same time, so triggering the update on either branches should produce the same results.