Don't exit on community discovery error

Author: chris-y

bestof.py

@@ -137,7 +137,7 @@ def run(user, pw, instance, postcomm, cfg, post_title, images_only, nsfw_b, modu
       community_id = lemmy.discover_community(comm)
     except Exception as e:
       print(f'discover {comm} failed: {e}\n')
-      sys.exit(1) # bomb out so the bot retries
+      continue # skip communities we can't find
 
     if community_id is not None:
       try: