Fix links in changelog

Author: Disasm

riscv-rt/CHANGELOG.md

@@ -75,8 +75,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 
 [Unreleased]: https://github.com/rust-embedded/riscv-rt/compare/v0.8.1..HEAD
-[v0.8.1]: https://github.com/rust-embedded/riscv/compare/v0.8.0...v0.8.1
-[v0.8.0]: https://github.com/rust-embedded/riscv/compare/v0.7.2...v0.8.0
-[v0.7.2]: https://github.com/rust-embedded/riscv/compare/v0.7.1...v0.7.2
-[v0.7.1]: https://github.com/rust-embedded/riscv/compare/v0.7.0...v0.7.1
-[v0.7.0]: https://github.com/rust-embedded/riscv/compare/v0.6.1...v0.7.0
+[v0.8.1]: https://github.com/rust-embedded/riscv-rt/compare/v0.8.0...v0.8.1
+[v0.8.0]: https://github.com/rust-embedded/riscv-rt/compare/v0.7.2...v0.8.0
+[v0.7.2]: https://github.com/rust-embedded/riscv-rt/compare/v0.7.1...v0.7.2
+[v0.7.1]: https://github.com/rust-embedded/riscv-rt/compare/v0.7.0...v0.7.1
+[v0.7.0]: https://github.com/rust-embedded/riscv-rt/compare/v0.6.1...v0.7.0