Fix CoC URL in README

Author: lionel-

README.Rmd

@@ -69,7 +69,7 @@ This example illustrates some of the advantages of purrr functions over the equi
   generating anonymous functions), a character vector (used to extract 
   components by name), or a numeric vector (used to extract by position).
 
-## Code of conduct
+-----
 
-Please note that this project is released with a [Contributor Code of Conduct](CODE_OF_CONDUCT.md).
+Please note that this project is released with a [Contributor Code of Conduct](https://purrr.tidyverse.org/CODE_OF_CONDUCT).
 By participating in this project you agree to abide by its terms.

README.md

@@ -72,8 +72,8 @@ the equivalents in base R:
     to extract components by name), or a numeric vector (used to extract
     by position).
 
-## Code of conduct
+-----
 
 Please note that this project is released with a [Contributor Code of
-Conduct](CODE_OF_CONDUCT.md). By participating in this project you agree
+Conduct](https://purrr.tidyverse.org/CODE_OF_CONDUCT). By participating in this project you agree
 to abide by its terms.