integrations: Add missing instruction to create-a-bot docs macros.

templates/zerver/help/include/create-a-bot.md

@@ -8,3 +8,5 @@ Next, on your {{ settings_html|safe }},
 The API key for an incoming webhook bot cannot be used to read messages out
 of Zulip. Thus, using an incoming webhook bot lowers the security risk of
 exposing the bot's API key to a third-party service.
+
+Fill out the rest of the fields, and click **Create bot**.

templates/zerver/help/include/create-bot-construct-url-indented.md

@@ -9,7 +9,9 @@
     of Zulip. Thus, using an incoming webhook bot lowers the security risk of
     exposing the bot's API key to a third-party service.
 
-    Construct the URL for the {{ integration_display_name }}
+    Fill out the rest of the fields, and click **Create bot**.
+
+    Now, construct the URL for the {{ integration_display_name }}
     bot using the bot's API key and the desired stream name:
 
     {!webhook-url.md!}