chore: fix badge links (#141)

Author: koushiro

README.md

@@ -19,15 +19,15 @@ A collection of [`BIPs`](https://github.com/bitcoin/bips) crates implemented by
 [bip0032-crates-url]: https://crates.io/crates/bip0032
 [bip0032-docs-svg]: https://docs.rs/bip0032/badge.svg
 [bip0032-docs-url]: https://docs.rs/bip0032
-[bip0032-gha-svg]: https://github.com/koushiro/rust-bips/workflows/bip0032/badge.svg
+[bip0032-gha-svg]: https://github.com/koushiro/rust-bips/actions/workflows/bip0032.yml/badge.svg?branch=main
 
 <!-- bip0039 -->
 
 [bip0039-crates-svg]: https://img.shields.io/crates/v/bip0039
 [bip0039-crates-url]: https://crates.io/crates/bip0039
 [bip0039-docs-svg]: https://docs.rs/bip0039/badge.svg
 [bip0039-docs-url]: https://docs.rs/bip0039
-[bip0039-gha-svg]: https://github.com/koushiro/rust-bips/workflows/bip0039/badge.svg
+[bip0039-gha-svg]: https://github.com/koushiro/rust-bips/actions/workflows/bip0039.yml/badge.svg?branch=main
 
 ## License