fix(addons): fix index mongo version description (#127)

Author: EamonZhang

addons/index.yaml

@@ -67,7 +67,6 @@ entries:
   mongodb:
     - version: 7.0
       description: "MongoDB is a document database designed for ease of application development and scaling."
-  mongodb:
     - version: 8.0
       description: "MongoDB is a document database designed for ease of application development and scaling."
   clickhouse: