Prepare changelog for 3.23.0

Author: mrnugget

CHANGELOG.md

@@ -13,6 +13,16 @@ All notable changes to `src-cli` are documented in this file.
 
 ### Added
 
+### Changed
+
+### Fixed
+
+### Removed
+
+## 3.23.0
+
+### Added
+
 - Experimental: [`transformChanges` in campaign specs](https://docs.sourcegraph.com/campaigns/references/campaign_spec_yaml_reference#transformchanges) is now available as a feature preview to allow users to create multiple changesets in a single repository. [#398](https://github.com/sourcegraph/src-cli/pull/398)
 
 ### Changed
@@ -24,6 +34,7 @@ All notable changes to `src-cli` are documented in this file.
 - Two race conditions in the terminal UI of `src campaign [apply|preview]` have been fixed. [#399](https://github.com/sourcegraph/src-cli/pull/399)
 - A regression caused repositories on unsupported code host to not be skipped by `src campaign [apply|preview]`, regardless of whether `-allow-unsupported` was set or not. [#403](https://github.com/sourcegraph/src-cli/pull/403)
 - Previously `src campaign [apply|preview]` would crash when executing a campaign spec that contained `steps` but no `changesetTemplate`. [#406](https://github.com/sourcegraph/src-cli/issues/406)
+- `src extensions copy` would copy an extension from the wrong Sourcegraph instance. [#409](https://github.com/sourcegraph/src-cli/pull/409)
 
 ### Removed