update publishing rules

On-behalf-of: @SAP [email protected]

Author: xrstf

staging/publishing/rules.yaml

@@ -8,6 +8,15 @@ rules:
             - staging/src/github.com/kcp-dev/apimachinery
     destination-tag-base: v2
     library: true
+  - destination: client-go
+    branches:
+      - name: new-kcp-1.33.3
+        source:
+          branch: main
+          dirs:
+            - staging/src/github.com/kcp-dev/client-go
+    destination-tag-base: v2
+    library: true
 recursive-delete-patterns:
   - '*/.gitattributes'
 default-go-version: 1.24.5