Fix typo in README.md (#513)

Co-authored-by: cachho <admin@ch-webdev.com>
Co-authored-by: Taranjeet Singh <reachtotj@gmail.com>

README.md

@@ -69,7 +69,7 @@ elon_bot.query("How many companies does Elon Musk run?")
 Contributions are welcome! Please check out the issues on the repository, and feel free to open a pull request.
 For more information, please see the [contributing guidelines](CONTRIBUTING.md).
 
-For more refrence, please go through [Development Guide](https://docs.embedchain.ai/contribution/dev) and [Documentation Guide](https://docs.embedchain.ai/contribution/docs).
+For more reference, please go through [Development Guide](https://docs.embedchain.ai/contribution/dev) and [Documentation Guide](https://docs.embedchain.ai/contribution/docs).
 
 
 ## Citation