add safehaven-4.0.1-release.md as SH-4.0.1 release notes
add safehaven-4.0.1-release.md as SH-4.0.1 release notes

jtowns3/PublicKB,robertlesieur/PublicKB,DLM1/PublicKB,jwcolbert/PublicKB,jwebs1/PublicKB,anthonyvetter/PublicKB,ack/PublicKB,daveshac/PublicKB