docs: fix wording in CHANGELOG.md (#108)

Author: esse

CHANGELOG.md

@@ -154,7 +154,7 @@ This version moves Cloud PubSub from Tesla to Finch, so read the notes below and
 - **Possible breaking change:** due to the fact that we've switched from Tesla to Finch,
   it's not longer sufficient to replace `:base_url` in `:google_api_pub_sub` config.
 
-  If your app is using the emulator, instead of setting in the `config/dev.exs`:
+  If your app is using the emulator, use following settings in the `config/dev.exs`:
 
   ```elixir
   producer: [