fix(docs): menu main duplicate field (#837)

Author: ldez

docs/hugo.yaml

@@ -116,7 +116,6 @@ menu:
       params:
         type: link
         icon: beaker
-      parent: versions
     - identifier: v0.10
       name: v0.10 ↗
       url: https://imfing.github.io/hextra/versions/v0.10/