Update CHANGELOG.md

Author: Thinh Nguyen

CHANGELOG.md

@@ -13,5 +13,5 @@ Observes [Semantic Versioning](https://semver.org/spec/v2.0.0.html) standard and
 + Probe table supporting: Neuropixels probes 1.0 - 3A, 1.0 - 3B, 2.0 - SS, 2.0 - MS
 
 
-[0.1.0a4]: https://github.com/datajoint/element-array-ephys/compare/0.1.0a2...0.1.0a3
+[0.1.0a3]: https://github.com/datajoint/element-array-ephys/compare/0.1.0a2...0.1.0a3
 [0.1.0a2]: https://github.com/datajoint/element-array-ephys/releases/tag/0.1.0a2