Bump patch version for README update

Author: clarkmoody

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bitcoin-bech32"
-version = "0.8.0"
+version = "0.8.1"
 authors = ["Clark Moody"]
 repository = "https://github.com/rust-bitcoin/rust-bech32-bitcoin"
 description = "Encodes and decodes Bitcoin Segregated Witness addresses in Bech32"