Merge pull request 'Add arts-pla'' (#66) from add_arts_pla into master

Reviewed-on: https://git.rz.ens.wtf/Klub-RZ/metis/pulls/66

data/calendars.json

@@ -31,6 +31,7 @@
       "BandarrêtdurgENS": {},
       "L'Hômonerie": {},
       "Ulmity": {},
+      "Arts pla'": {},
       "Club Inutile ☔": {}
     },
     "BDS": {
@@ -190,6 +191,10 @@
       "TWgNxdri7zQSoiRf": {
         "name": "Conférences de recherche",
 	"short_name": "Conf"
+      },
+      "MJf2wnQafbLc2arS": {
+        "name": "Arts pla'",
+	"color": "#ffb969"
       }
     }
   }