help: Remove "general chat" italic formatting for title/sidebar.

Once the help center has transitioned to astro, we will look at
adding back the formatting to the title and sidebar for these
two articles: "General chat topic" and "General chat channels".

help/general-chat-channels.md

@@ -1,4 +1,4 @@
-# “*General chat*” channels
+# “General chat” channels
 
 Zulip's [topics](/help/introduction-to-topics) help you keep conversations
 organized, but you may not need topics in some channels (e.g., a social channel,

help/general-chat-topic.md

@@ -1,4 +1,4 @@
-# “*General chat*” topic
+# “General chat” topic
 
 Zulip's [topics](/help/introduction-to-topics) help you keep conversations
 organized, but you may sometimes want to send a message without a topic. For

help/include/sidebar_index.md

@@ -157,7 +157,7 @@
 * [Rename a topic](/help/rename-a-topic)
 * [Resolve a topic](/help/resolve-a-topic)
 * [Move content to another topic](/help/move-content-to-another-topic)
-* [“*General chat*” topic](/help/general-chat-topic)
+* [“General chat” topic](/help/general-chat-topic)
 * [Delete a topic](/help/delete-a-topic)
 
 ## Notifications
@@ -218,7 +218,7 @@
 * [Private channels](/help/channel-permissions#private-channels)
 * [Public channels](/help/channel-permissions#public-channels)
 * [Public access option](/help/public-access-option)
-* [“*General chat*” channels](/help/general-chat-channels)
+* [“General chat” channels](/help/general-chat-channels)
 * [Channel folders](/help/channel-folders)
 * [Channel permissions](/help/channel-permissions)
 * [Channel posting policy](/help/channel-posting-policy)