Switch colab link to master copy

README.md

@@ -8,7 +8,7 @@ PySR is built on an extremely optimized pure-Julia backend, and uses regularized
 
 | **Docs** | **colab** | **pip** | **conda** | **Stats** |
 |---|---|---|---|---|
-|[![Documentation](https://github.com/MilesCranmer/PySR/actions/workflows/docs.yml/badge.svg)](https://astroautomata.com/PySR/)|[![Colab](https://img.shields.io/badge/colab-notebook-yellow)](https://colab.research.google.com/github/MilesCranmer/PySR/blob/colab-demo/examples/pysr_demo.ipynb)|[![PyPI version](https://badge.fury.io/py/pysr.svg)](https://badge.fury.io/py/pysr)|[![Conda Version](https://img.shields.io/conda/vn/conda-forge/pysr.svg)](https://anaconda.org/conda-forge/pysr)|[![Downloads](https://pepy.tech/badge/pysr)](https://badge.fury.io/py/pysr)|
+|[![Documentation](https://github.com/MilesCranmer/PySR/actions/workflows/docs.yml/badge.svg)](https://astroautomata.com/PySR/)|[![Colab](https://img.shields.io/badge/colab-notebook-yellow)](https://colab.research.google.com/github/MilesCranmer/PySR/blob/master/examples/pysr_demo.ipynb)|[![PyPI version](https://badge.fury.io/py/pysr.svg)](https://badge.fury.io/py/pysr)|[![Conda Version](https://img.shields.io/conda/vn/conda-forge/pysr.svg)](https://anaconda.org/conda-forge/pysr)|[![Downloads](https://pepy.tech/badge/pysr)](https://badge.fury.io/py/pysr)|
 
 
 (pronounced like *py* as in python, and then *sur* as in surface)