Bokeh 3.0.2 is released

Bokeh 3.0.2 is published with some necessary hotfixes for import issues, and a few other small bugfixes

There were some post-3.0 fixes that necessitated a few quick releases, but FYI we are are targeting a ~2 month release cycle going forward, either a minor feature release if the next release branch is ready, or a point release collecting recent bugfixes if not.