Update README.md

README.md

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 # CS269I: Incentives in Computer Science
 
-Online course reader for Stanford's CS269I based on notes from the amazing [Eric Gao](https://twitter.com/gaoooric) and lectures from [Aviad Rubinstein](https://cs.stanford.edu/~aviad/). This course covers many topics across algorithmic game theory (AGT).
+Online course reader for Stanford's CS269I based on notes from the amazing [Eric Gao](https://sites.google.com/view/gaoric/home?authuser=0) and lectures from [Aviad Rubinstein](https://cs.stanford.edu/~aviad/). This course covers many topics across algorithmic game theory (AGT).
 
 
 ## Additional Resources
@@ -20,4 +20,4 @@ The course reader is built around [Jupyter Book](https://jupyterbook.org/en/stab
 To compile the book locally run:
 ```bash
 jupyter-book build docs
-```
+```