🚸 Pick a better max for number of item per collated content.

Scrolling through more 30 article titles in the sieve, felt too much
of doom scrolling to me. Let's try 10.

wom_user/settings.py

@@ -35,7 +35,7 @@
 if hasattr(settings, "WOM_WEB_FEED_COLLATION_MAX_NUM_REF_TARGET"):
   WEB_FEED_COLLATION_MAX_NUM_REF_TARGET = settings.WOM_WEB_FEED_COLLATION_MAX_NUM_REF_TARGET
 else:
-  WEB_FEED_COLLATION_MAX_NUM_REF_TARGET = 30
+  WEB_FEED_COLLATION_MAX_NUM_REF_TARGET = 10
 
 if hasattr(settings,"WOM_WEB_FEED_COLLATION_TIMEOUT"):
   WEB_FEED_COLLATION_TIMEOUT = settings.WOM_WEB_FEED_COLLATION_TIMEOUT