DOCS-#2179: Bump version to 0.8.1 (#2180)
DOCS-#2179: Bump version to 0.8.1 (#2180)

Signed-off-by: Devin Petersohn <9526cbaf745870a4c947dfa2bd5208403b463ac3@gmail.com>
modin-project/modin,modin-project/modin