Update '.drone.yml'

.drone.yml

@@ -6,11 +6,10 @@ steps:
   - name: deploy
     image: appleboy/drone-scp
     settings:
-      username:
+      user:
         from_secret: user
       key:
         from_secret: ssh_key
-      host: 
-        - mastodon.bida.im
+      host: mastodon.bida.im
       source: ./
       target: ~/MastodonMegafono