Added missing mamba package to test_spechomo_install CI job.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
6 jobs for master in 50 minutes and 11 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed test_spechomo #84688

00:01:31

78.0%
passed test_spechomo_install #84691

00:46:36

passed test_styles #84689

00:00:27

passed test_urls #84690

00:01:07

 
  Deploy
passed pages #84692

00:00:28

passed pages:deploy

00:00:02