Remove needless string from Dazaifu URL

Author: yasulab

db/dojos.yaml

@@ -1870,7 +1870,7 @@
   name: 太宰府 (九州)
   prefecture_id: 40
   logo: "/img/dojos/dazaifu.png"
-  url: https://www.facebook.com/pg/CoderDojoDazaifu/
+  url: https://www.facebook.com/CoderDojoDazaifu/
   description: 福岡県太宰府市で毎月開催
   tags:
   - Scratch