Fix misspelling (runing -> running)

joshua-scott · erquhart · commit e802eea84098 · 2018-01-16T13:58:17.000-05:00
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -27,7 +27,7 @@ $ npm run test
 $ npm run test:watch
 ```
 
-## Runing the server
+## Running the server
 
 ```sh
 $ npm run start
