po: update Polish (pl) translation

!109
5 jobs for nm-1-16 in 57 minutes and 46 seconds (queued for 24 seconds)
Status Job ID Name Coverage
  Test
passed #238393
build_f28

00:49:42

passed #238394
build_f29

00:33:04

passed #238395
build_f30

00:31:54

failed #238396
allowed to fail
build_frawhide

00:20:37

passed #238392
allowed to fail
checkpatch

00:06:15

 
Name Stage Failure
failed
build_frawhide Test
UUID=f4000954-d745-4c5f-bc24-444b6e3cb39c
BASEDIR=/builds/NetworkManager/NetworkManager/contrib/fedora/rpm/NetworkManager.20190415-143728.xuzGWa
warning: Macro expanded in comment on line 144: %{real_version_major}/%{name}-%{real_version}.tar.xz

error: This macro requires some arguments
error: line 858: %systemd_postun

ERROR: rpmbuild FAILED
ERROR: Job failed: exit code 1