Checkout `upcoming` branch of naev-website when building naev-docs #73

Job	Run time
deploy_images / image_build (naev-artwork/blender2.79b, naev-artwork, blender2.79b)	2m 41s
deploy_images / image_build (naev-docs, naev-docs)	12m 50s
deploy_images / image_build (naev-release, naev-release)	2m 24s
deploy_images / image_build (naev-steamruntime, naev-steamruntime)	1m 42s
deploy_images / image_build (naev-windows, naev-windows)	1m 27s
deploy_images / image_build (naev-macos, naev-macos)	15m 26s
create_release	5s
	36m 35s

Provide feedback