Update README.md

Author: vazirim

README.md

@@ -17,7 +17,7 @@ PDL provides the following features:
 
 The PDL interpreter takes a PDL program as input and renders it into a document by execution its instructions (calling out to models, code, etc...). 
 
-See below for a quick reference, followed by [installation notes](#Interpreter installation) and an [overview](#overview) of the language. A more detailed description of the language features can be found in this [tutorial](https://ibm.github.io/prompt-declaration-language/tutorial).
+See below for a quick reference, followed by [installation notes](#interpreter_installation) and an [overview](#overview) of the language. A more detailed description of the language features can be found in this [tutorial](https://ibm.github.io/prompt-declaration-language/tutorial).
 
 
 ## Quick Reference