Update portfolio.md

portfolio.md

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 ## Preidcting Divvy Bike Share 
 This project uses an advanced neural network learning to predict Divvy bike station usage.
 #### [Write Up](/divvy_write_up/)
-##### - This links to a non-techincal write up of my project.
+##### - This links a write up of the Divvy project intended as a mock memo for a semi-techical audience that includes urban planners, data scientists, and professionals within the transportation management and city administration sectors.
 #### [Divvy Paper](https://github.com/noahba65/stemGNN_divvy/blob/capstone/Assignments/final-paper/final_paper.pdf)
 ##### - This links to a highly techinical and academic write up of the project. Note that the results reported here differ slightly from the write up since I used different metrics and sligthly different calculations.