Replaced deprecated HTTP links. Updated version info.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
4 jobs for v0.15.6 in 41 minutes and 54 seconds (queued for 13 minutes and 15 seconds)
latest
Status Job ID Name Coverage
  Test
passed #40521
test_py_tools_ds

00:00:22

63.0%
passed #40522
test_styles

00:00:16

 
  Deploy Pypi
passed #40523
deploy_pypi

00:00:17

 
  Deploy Conda
passed #40524
deploy_anaconda

00:40:58