Update standards version to 4.1.5, no changes needed.

Changes-By: lintian-brush
Fixes: lintian: ancient-standards-version
See-also: https://lintian.debian.org/tags/ancient-standards-version.html
2 jobs for lintian-fixes in 29 seconds (queued for 4 seconds)
Status Name Job ID Coverage
  Build
failed build_pkg:buster:amd64 #47071
amd64

00:00:06

passed pkg_src #47070

00:00:22

 
Name Stage Failure
failed
build_pkg:buster:amd64 Build
1 not fully installed or removed.
After this operation, 9216 B disk space will be freed.
Do you want to continue? [Y/n] (Reading database ... (Reading database ... 5% (Reading database ... 10% (Reading database ... 15% (Reading database ... 20% (Reading database ... 25% (Reading database ... 30% (Reading database ... 35% (Reading database ... 40% (Reading database ... 45% (Reading database ... 50% (Reading database ... 55% (Reading database ... 60% (Reading database ... 65% (Reading database ... 70% (Reading database ... 75% (Reading database ... 80% (Reading database ... 85% (Reading database ... 90% (Reading database ... 95% (Reading database ... 100% (Reading database ... 29725 files and directories currently installed.)
Removing mailman-build-deps (1:2.1.29-1+0~20211128020951~1.5af509e4) ...
mk-build-deps: Unable to install mailman-build-deps at /usr/bin/mk-build-deps line 416.
mk-build-deps: Unable to install all build-dep packages
ERROR: could not install package build dependencies
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1