Fix download link and templates

Reviewed-by: https://github.com/apps/wazo-zuul

WAZO-1691: fix Yealink T58A

Reviewed-by: https://github.com/apps/wazo-zuul

WAZO-1944: Yealink T3X in v85

WAZO-1849: add Cisco 7800 series 11.3.1 plugin

Add Firmware 2.0.4.6.41

Reviewed-by: Alexandre Fournier
             https://github.com/bloom1

remove duplicates entry and add correct "files" informations

aastra 3.3.1-sp4: update links

Reviewed-by: https://github.com/apps/wazo-zuul

Snom plugins update

Reviewed-by: Yannick MOLINET
             https://github.com/ymolinet