update category for memos

Author: tigerinus

Apps/Memos/docker-compose.yml

@@ -47,7 +47,7 @@ x-casaos:
     - arm64
   main: memos
   author: usememos Team
-  category: Downloader
+  category: Notes
   description:
     en_us: Memos is a lightweight, self-hosted memo hub. Open Source and Free forever.
     zh_cn: Memos 是一个轻量级的自托管Memos中心。 开源且永远免费。