Update link to CoderDojo 品川御殿山

Author: yasulab

db/dojos.yaml

@@ -851,7 +851,7 @@
   created_at: '2018-09-26'
   name: 品川御殿山
   prefecture_id: 13
-  url: https://www.roundtable.co.jp/~tomio/blog/i01coach/?page_id=2532
+  url: https://shinagawa-gotenyama.coderdojo.roundtable.jp/
   logo: "/img/dojos/shinagawa-gotenyama.png"
   description: 品川区で不定期開催
   tags: