Add CHANGELOG for v1.7.0

Author: misraved

CHANGELOG.md

@@ -1,3 +1,13 @@
+## v1.7.0 [2025-10-17]
+
+_What's new?_
+
+- New tables added ([#516](https://github.com/turbot/steampipe-plugin-github/pull/516))
+  - [github_actions_environment_variable](https://hub.steampipe.io/plugins/turbot/github/tables/github_actions_environment_variable)
+  - [github_actions_organization_variable](https://hub.steampipe.io/plugins/turbot/github/tables/github_actions_organization_variable)
+  - [github_actions_repository_variable](https://hub.steampipe.io/plugins/turbot/github/tables/github_actions_repository_variable)
+
+
 ## v1.6.1 [2025-10-13]
 
 _Dependencies_