Merge update-image-tag/router/production/0919caf90a8ff415653f75e79bd55a8f59c5c057 into main

Author: govuk-ci

charts/app-config/image-tags/production/router

@@ -1,3 +1,3 @@
-image_tag: v231
+image_tag: 0919caf90a8ff415653f75e79bd55a8f59c5c057
 automatic_deploys_enabled: false
 promote_deployment: false