Adding image of UI to README (#54)

Author: steven10a

README.md

@@ -4,6 +4,8 @@ This is the Python version of OpenAI Guardrails, a package for adding configurab
 
 Most users can simply follow the guided configuration and installation instructions at [guardrails.openai.com](https://guardrails.openai.com/).
 
+[![OpenAI Guardrails configuration screenshot](docs/assets/images/guardrails-python-config-screenshot-100pct-q70.webp)](https://guardrails.openai.com)
+
 ## Installation
 
 You can download [openai-guardrails package](https://pypi.org/project/openai-guardrails/) this way: