Bump changelog in preparation of 2.1.0 release.

Author: pattisdr

CHANGELOG.md

@@ -14,7 +14,10 @@ The types of changes are:
 - `Fixed` for any bug fixes.
 - `Security` in case of vulnerabilities.
 
-## [Unreleased](https://github.com/ethyca/fideslang/compare/2.0.4...main)
+## [Unreleased](https://github.com/ethyca/fideslang/compare/2.1.0...main)
+
+
+## [2.1.0](https://github.com/ethyca/fideslang/compare/2.0.4...2.1.0)
 
 ### Added