Update logo

Use color palette an size according to
https://developer.gnome.org/hig/stable/icon-design.html.en
7 jobs for master in 4 minutes and 26 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Linting
passed #74441
bandit

00:00:41

passed #74444
mypy

00:00:51

passed #74443
pyflakes

00:00:33

passed #74442
pylint

00:01:08

 
  Test
passed #74447
whitewhale
tests:archlinux

00:01:41

passed #74445
tests:debian

00:01:14

100.0%
passed #74446
whitewhale
tests:fedora

00:03:15