Update changelog for v0.8.16 (#707)

Author: bobbyiliev

Diff for: CHANGELOG.md

@@ -1,10 +1,12 @@
 # Changelog
 
-## Unreleased
+## 0.8.16 - 2025-04-03
 
 ### Misc
 
-* Upgraded Go version from `1.22.7` to `1.23.6` for improved performance and security fixes.
+* Upgraded Go version from `1.22.7` to `1.23.6` for improved performance and security fixes [#706](https://github.com/MaterializeInc/terraform-provider-materialize/pull/706)
+
+* Routine dependency updates: [#703](https://github.com/MaterializeInc/terraform-provider-materialize/pull/703), [#704](https://github.com/MaterializeInc/terraform-provider-materialize/pull/704), [#705](https://github.com/MaterializeInc/terraform-provider-materialize/pull/705)
 
 ## 0.8.15 - 2025-02-27