Fix invalid substitution in de.po (!47)

Fixes the error:
  (gpartedbin:995): glibmm-WARNING **: 09:11:54.522: invalid
  substitution "%2" in fmt string "%2 Operationen stehen momentan aus."

Closes !47 - Fix invalid substitution in de.po
4 jobs for patch-1 in 18 minutes and 20 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #363710
centos_build

00:04:14

passed #363711
ubuntu_build

00:06:45

 
  Test
passed #363712
centos_test

00:08:47

passed #363713
ubuntu_test

00:11:34