Update README.md

fix a typo

README.md

@@ -505,7 +505,7 @@ Interested in getting involved? We would like to help you!
 * Take a look at our [issues list](https://github.com/fatedier/frp/issues) and consider sending a Pull Request to **dev branch**.
 * If you want to add a new feature, please create an issue first to describe the new feature, as well as the implementation approach. Once a proposal is accepted, create an implementation of the new features and submit it as a pull request.
 * Sorry for my poor english and improvement for this document is welcome even some typo fix.
-* If you have some wanderful ideas, send email to [email protected].
+* If you have some wonderful ideas, send email to [email protected].
 
 **Note: We prefer you to give your advise in [issues](https://github.com/fatedier/frp/issues), so others with a same question can search it quickly and we don't need to answer them repeatly.**