Add CHANGELOG for v0.56.0 (#625)

CHANGELOG.md

@@ -1,3 +1,24 @@
+## v0.56.0 [2024-07-31]
+
+_Breaking changes_
+
+- Removed the following columns in `gcp_cloudfunctions_function` table to align with the new API response structure: ([#612](https://github.com/turbot/steampipe-plugin-gcp/pull/612))
+  - `environment_variables`
+  - `source_upload_url`
+  - `version_id`
+
+_What's new?_
+
+- Added the `impersonate_access_token` config argument to support plugin authentication by using a pre-generated temporary access token. ([#621](https://github.com/turbot/steampipe-plugin-gcp/pull/621))
+
+_Enhancements_
+
+- Added 17 new columns to the `gcp_cloudfunctions_function` table. ([#612](https://github.com/turbot/steampipe-plugin-gcp/pull/612))
+
+_Bug fixes_
+
+- Fixed the cache key issue in the `SecretManager` service client creation. ([#624](https://github.com/turbot/steampipe-plugin-gcp/pull/624))
+
 ## v0.55.0 [2024-07-22]
 
 _Enhancements_