Prepare 2.1.x

Author: ondrejmirtes

.github/workflows/apiref.yml

@@ -5,7 +5,7 @@ name: "Deploy API Reference"
 on:
   push:
     branches:
-      - "2.0.x"
+      - "2.1.x"
 
 concurrency:
   group: "pages"
@@ -21,6 +21,7 @@ jobs:
         branch:
           - "1.23.x"
           - "2.0.x"
+          - "2.1.x"
 
     steps:
       - name: "Checkout"