Minor text cleanup to Weechat example

To "embedded" is incorrect, and it's probably best to make clear, the example expects Weechat to be running with an existing status bar.
Thanks!

README.md

@@ -227,7 +227,7 @@ set -g status-right "$WEATHER ..."
 
 ### Weechat
 
-To embedded into an IRC ([Weechat](https://github.com/weechat/weechat)) client's status bar:
+To embed in to an IRC ([Weechat](https://github.com/weechat/weechat)) client's existing status bar:
 
 ```
 /alias add wttr /exec -pipe "/set plugins.var.python.text_item.wttr all" url:wttr.in/Montreal?format=%l:+%c+%f+%h+%p+%P+%m+%w+%S+%s