Fix changelog

Author: afilini

CHANGELOG.md

@@ -340,4 +340,4 @@ final transaction is created by calling `finish` on the builder.
 [v0.5.0]: https://github.com/bitcoindevkit/bdk/compare/v0.4.0...v0.5.0
 [v0.5.1]: https://github.com/bitcoindevkit/bdk/compare/v0.5.0...v0.5.1
 [v0.6.0]: https://github.com/bitcoindevkit/bdk/compare/v0.5.1...v0.6.0
-[v0.6.0]: https://github.com/bitcoindevkit/bdk/compare/v0.6.0...v0.7.0
+[v0.7.0]: https://github.com/bitcoindevkit/bdk/compare/v0.6.0...v0.7.0