increase cache time for Shing channel status

app/services/venue.js

@@ -91,7 +91,7 @@ class VenueService extends SiteService {
     json = await response.json();
 
     const { channel } = json;
-    await cacheService.setObjectEx(cacheKey, 10, channel);
+    await cacheService.setObjectEx(cacheKey, 30, channel);
 
     return channel;
   }