Cleanup README

Fix #134
6 jobs for readme-cleanup in 24 minutes and 49 seconds (queued for 5 seconds)
Status Name Job ID Coverage
  Lint
passed shellcheck #16876

00:00:13

passed shfmt #16877

00:00:10

 
  Build
passed build #16878
fast-single-thread

00:20:13

 
  Test
passed test-basic-qemu #16880
fast-single-thread

00:03:05

passed test-cloudimg-qemu #16881
fast-single-thread

00:04:20

passed test-vagrant-boxes-format #16879

00:00:49