debug DiscordGuildCache (x2)

- avoid ratelimit.

webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/utils/DiscordGuildCache.kt

@@ -58,7 +58,7 @@ object DiscordGuildCache {
                 )
             }
             lastGuildId = guilds.last().id
-            delay(300)
+            delay(1000)
         }
     }
 }