Update README.md

Author: okhat

README.md

@@ -58,10 +58,16 @@ Ditto! **DSPy** gives you the right general-purpose modules (e.g., `ChainOfThoug
 
 All you need is:
 
-```
+```bash
 pip install dspy-ai
 ```
 
+To install the very latest from `main`:
+
+```bash
+pip install git+https://github.com/stanfordnlp/dspy.git
+````
+
 Or open our intro notebook in Google Colab: [<img align="center" src="https://colab.research.google.com/assets/colab-badge.svg" />](https://colab.research.google.com/github/stanfordnlp/dspy/blob/main/intro.ipynb)
 
 By default, DSPy installs the latest `openai` from pip. However, if you install old version before OpenAI changed their API `openai~=0.28.1`, the library will use that just fine. Both are supported.