chore: update nucleus config CLCO master (#5447)

* chore: update nucleus config

* chore: add a comment about nucleus configs

Author: jmsjtu

.nucleus.yaml

@@ -32,7 +32,8 @@ branches:
         pull-request:
             <<: *branch-definition
             merge-method: force-push # release branch should always be in sync with master branch (linear history)
-    winter25:
+    # Only active branches need to be included in this config
+    winter26:
         pull-request:
             <<: *branch-definition
     spring25: