Update antora.yml

Author: philipwindecker

.antora/antora.yml

@@ -7,6 +7,7 @@ version:
   main: 'current'
   master: 'current'
   v(*)-antora: V$1
+  x-antora-v(*): V$1
   v(*): V$1
   V(*): V$1
   # Update version number accordingly. This is the version for any other activated branch (branch must be added in the generator site.yml!). Schema = 0.0.x-<branch-name> (only works for branches starting with "feature/")