Add CHANGELOG link to release

CHANGELOG.md

@@ -4,6 +4,6 @@ All notable changes to this project will be documented in this file.
 
 Instructions on how to update this Changelog are available in the `Updating the Changelog` section of the [`CONTRIBUTING.md`](./CONTRIBUTING.md). This project follows [semantic versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Release v1.0.0](...)
+## [Release v1.0.0](https://github.com/nhsx/hypergraph-mm/releases/tag/v1.0.0)
 
 Initial release including code to calculate hyperedge weights, hyperarc weights, node weight, Eigenvector centrality and PageRank centrality from hypergraphs, associated with the pre-print [Representing multimorbid disease progressions using directed hypergraphs](https://doi.org/10.1101/2023.08.31.23294903).