Merge pull request #279 from chentao1596/fix-examples-requires

fix wrong link in the file of examples/README.md

Author: aledbf

examples/README.md

@@ -1,7 +1,7 @@
 # Ingress examples
 
 This directory contains a catalog of examples on how to run, configure and
-scale Ingress. Please review the [prerequisities](prerequisites.md) before
+scale Ingress. Please review the [prerequisities](PREREQUISITES.md) before
 trying them.
 
 ## Basic cross platform