DEV: Use proper wording for contexts in specs

spec/lib/topic_query/private_message_lists_spec.rb

@@ -99,7 +99,7 @@ RSpec.describe TopicQuery::PrivateMessageLists do
       expect(topics).to eq([])
     end
 
-    context "Calculating minimum unread count for a topic" do
+    context "when calculating minimum unread count for a topic" do
       before do
         group.update!(publish_read_state: true)
         group.add(user)