adjust versions in readme
adjust versions in readme

SecurityInsanity/rusoto,DualSpark/rusoto,DualSpark/rust-aws,SecurityInsanity/rusoto,DualSpark/rusoto,mattico/rusoto,DualSpark/rusoto,DualSpark/rust-aws,rusoto/rusoto,DualSpark/rust-aws,rusoto/rusoto,mattico/rusoto,rusoto/rusoto,mattico/rusoto