Add CHANGELOG for v0.16.0 (#34)

Co-authored-by: Ved misra <47312748+misraved@users.noreply.github.com>

CHANGELOG.md

@@ -1,3 +1,9 @@
+## v0.16.0 [2024-02-05]
+
+_Enhancements_
+
+- Updated all the tables to fetch the column data using hydrate functions to optimize the API calls and increase query speed when querying specific columns. ([#30](https://github.com/turbot/steampipe-plugin-guardrails/pull/30))
+
 ## v0.15.0 [2024-01-30]
 
 _What's new?_