changelog: update for 4.30.9 (#771)

CHANGELOG.md

@@ -17,10 +17,18 @@ All notable changes to `src-cli` are documented in this file.
 
 ### Fixed
 
-- Global git email gets inserted as plain text when running `src batch new -f <file_name>` and doesn't result in a schema validation failure. [sourcegraph/src-cli#773](https://github.com/sourcegraph/src-cli/pull/773)
-
 ### Removed
 
+## 3.40.9
+
+### Added
+
+- A new [templating](https://docs.sourcegraph.com/campaigns/references/batch_spec_templating) variable, `batch_change_link` has been added for more control over where the "Created by Sourcegraph batch change ..." message appears in the published changeset description. [#491](https://github.com/sourcegraph/sourcegraph/pull/35319)
+
+### Fixed
+
+- Global git email gets inserted as plain text when running `src batch new -f <file_name>` and doesn't result in a schema validation failure. [sourcegraph/src-cli#773](https://github.com/sourcegraph/src-cli/pull/773)
+
 ## 3.40.8
 
 ### Fixed