improve handling of trailing separator in prefix (rstudio#10612)

Update NEWS-2021.09.2-ghost-orchid.md

Corrected the issue number for one of the feature updates.

update NEWS

Update NEWS-2021.09-ghost-orchid.md

Changed from 2021-08 to 2021-09

Merge pull request rstudio#9403 from rstudio/bugfix/windows-python-en…

…vironments-v2

ensure Python installations can be discovered when no Python on PATH

adjust all job names for tiger-daylily

fix running rsession unit tests on macos (rstudio#8691)

- Fixes rstudio#8685

update news with global replace fix

Update news

Remove auth cookies if can't obtain user