Added temporal installation of sphinx_rtd_theme and sphinx-argparse.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
3 jobs for feature/separate_ac_land_water in 13 minutes and 12 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #65275
test_enpt

00:11:03

91.0%
passed #65276
test_styles

00:00:41

passed #65277
test_urls

00:01:27