corrected typo (#113)

Author: Chandan Rai

readme.md

@@ -670,7 +670,7 @@ const map = (f) => (list) => list.map(f)
 
 __Further reading__
 * [Ramda's type signatures](https://github.com/ramda/ramda/wiki/Type-Signatures)
-* [Mostly Adaquate Guide](https://drboolean.gitbooks.io/mostly-adequate-guide/content/ch7.html#whats-your-type)
+* [Mostly Adequate Guide](https://drboolean.gitbooks.io/mostly-adequate-guide/content/ch7.html#whats-your-type)
 * [What is Hindley-Milner?](http://stackoverflow.com/a/399392/22425) on Stack Overflow
 
 ## Union type