Issue #3480767: Changelog.

CHANGELOG.md

 # GitLab Templates Changelog
 
+## 1.6.4 - 2024-10-18
+
+#3480767 - `browser_output` is empty when testing with Drupal 11 and `_PHPUNIT_CONCURRENT=0`.\
+#3481083 - Test-only changes should not revert changes in key files.\
+#3480296 - Only use Composer 2 in Drupal 7 pipelines.
+
 ## 1.6.3 - 2024-10-14
 
 #3479986 - `DRUPAL_CORE` not taken into account.\
@@ -54,7 +60,7 @@
 ## 1.5.5 - 2024-07-18
 
 #3461974 - Spellcheck: ignore svg files by default.\
-#3439644 - Documentation updates.
+#3439644 - Documentation updates.\
 #3458240 - expand_composer_json.php should not encode tags.\
 #3458411 - CSpell fails when drupal-dictionary.txt is missing.\
 #3459196 - The upgrade status job should allow adding options to the composer command.