Fix changelog link

Author: taminomara

CHANGELOG.md

@@ -40,7 +40,7 @@
 - Initial release.
 
 [unreleased]: https://github.com/sphinx-contrib/syntax/compare/v1.1.0...HEAD
-[1.1.0]: https://github.com/sphinx-contrib/syntax/compare/v1.0.1-post1...v1.0.1-post1
+[1.1.0]: https://github.com/sphinx-contrib/syntax/compare/v1.0.1-post1...v1.1.0
 [1.0.1-post1]: https://github.com/sphinx-contrib/syntax/compare/v1.0.1...v1.0.1-post1
 [1.0.1]: https://github.com/sphinx-contrib/syntax/compare/v1.0.0-post1...v1.0.1
 [1.0.0-post1]: https://github.com/sphinx-contrib/syntax/compare/v1.0.0...v1.0.0-post1