fix broken quick links

README.md

@@ -114,7 +114,7 @@ suggest that you take extra precautions [e.g. consider using the native Object.k
 1. [_.initial](#_initial)
 1. [_.pull](#_pull)
 
-**[Collection*](#collection*)**
+**[Collection*](#collection)**
 
 *:heavy_exclamation_mark:<b>Important:</b> Note that most native equivalents are array methods,
 and will not work with objects. If this functionality is needed and no object method is provided,
@@ -191,7 +191,7 @@ objects can easily be converted to an array by use of the
 1. [_.trim](#_trim)
 1. [_.upperFirst](#_upperFirst)
 
-**[Util](#string)**
+**[Util](#util)**
 
 1. [_.times](#_times)