short version of print_versions and print_header (scverse#1373)

Ignore RandomState references so rtd will build docs

add proper image (scverse#1231)

add proper image (scverse#1231)

Docs 1.4.6 (scverse#1112)

* reorganized landing page and release notes

* version 1.4.6

* added reference to sam docstring

make sure the newest umap is used in a test (scverse#1042)

Replace rank_genes_groups_dotplot with function link in sc.pl.dotplot…

… documentation (scverse#1008)

Require umap>=0.3.10 to prevent reports like scverse#948 (scverse#983)

potential 1.4.5.post1, fix requirements

fixed link to image; version 1.4.5