Update Miniconda download with changed URL
Update Miniconda download with changed URL

Fixes #813

arq5x/gemini,udp3f/gemini,bgruening/gemini,udp3f/gemini,udp3f/gemini,arq5x/gemini,arq5x/gemini,arq5x/gemini,bgruening/gemini,bgruening/gemini,bgruening/gemini,udp3f/gemini