Update README.md

Author: murphyk

README.md

@@ -4,7 +4,8 @@
 
 This repo is used to store the pdf for 
 <a href="https://probml.github.io/pml-book/book2.html">book 2</a>
-(see "downloadable assets" on RHS), and to keep track of downloads and issues,
-in a way which can be trakced separately than for 
+(see "releases" tab on RHS).
+This lets me keep track of downloads and issues
+in a way which can be tracked separately from 
 <a href="https://probml.github.io/pml-book/book1.html">book 1</a>.