Fix typo (#116)

diff --git a/README.md b/README.md
index e3f7714..53c11fd 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@
 ```
 This works on any deployment of Apache OpenWhisk
 
-### To use on deployment that contains the rutime as a kind
+### To use on deployment that contains the runtime as a kind
 To use as a kind action using Node.js 6
 ```
 wsk action update myAction myAction.js --kind nodejs:6