fixing epi book link for best practices

Author: carriewright11

07-durable-code.Rmd

@@ -191,7 +191,7 @@ Try to avoid using variable names that have no meaning like `tmp` or `x`, or `i`
 
 **More reading:**  
 
-- [R for Epidemiology - Coding best Practices](https://www.r4epi.com/coding-best-practices.html#object-variable-names) by @Cannell2021.
+- [R for Epidemiology - Coding best Practices](https://www.r4epi.com/chapters/best_practices/best_practices#object-variable-names) by @Cannell2021.
 - [Data Scientists: Your Variable Names Are Awful. Here’s How to Fix Them](https://towardsdatascience.com/data-scientists-your-variable-names-are-awful-heres-how-to-fix-them-89053d2855be) by @Koehrsen2019.  
 - [Writing Variable — Informative, Descriptive & Elegant](https://medium.datadriveninvestor.com/writing-variable-informative-descriptive-elegant-1dd6f3f15db3) by @Hobert2018.   
 

book.bib

@@ -135,7 +135,7 @@ @website{Bryan2021
 
 @book{Cannell2021,
 	title = {9 {Coding} best practices {\textbar} {R} for {Epidemiology}},
-	url = {https://brad-cannell.github.io/r4epi/},
+	url = {https://www.r4epi.com/},
 	abstract = {This is the textbook for Brad Cannell’s Introduction to R Programming for Epidemiologic Research course.},
 	urldate = {2021-11-02},
 	author = {Cannell, Brad},