Update README.md

link to python notebooks instead of markdown files under learning outcome exercises

README.md

@@ -8,14 +8,14 @@ This repo hosts training materials for the University of Cambridge [Part III Sys
 
 ### Learning outcomes
 
-#### [Exercise 1](https://github.com/franciscozorrilla/systems-biology-fba-practical/blob/main/notebooks/1_fba.md)
+#### [Exercise 1](https://github.com/franciscozorrilla/systems-biology-fba-practical/blob/main/notebooks/1_fba.ipynb)
 - **1.1**: Import a metabolic reconstruction
 - **1.2**: Inspect the reactions of your model
 - **1.3**: Inspect the metabolites in your model
 - **1.4**: Inspect the genes in your model
 - **1.4.1**: Perform in-silico gene knockout experiments
 
-#### [Exercise 2](https://github.com/franciscozorrilla/systems-biology-fba-practical/blob/main/notebooks/2_fba.md)
+#### [Exercise 2](https://github.com/franciscozorrilla/systems-biology-fba-practical/blob/main/notebooks/2_fba.ipynb)
 - **2.1**: Modify growth medium of your reconstruction
 - **2.2**: Perform gene essentiality analysis under different conditions
 - **2.3**: Case study, simulate the Crabtree effect in yeast