List NPM dependencies for HelloConcur (#172)

Author: milesfrain

recipes/HelloConcur/README.md

@@ -7,3 +7,7 @@ A Concur port of the ["HTML - Hello" Elm Example](https://elm-lang.org/examples/
 ### Browser
 
 The browser will display "Hello!" as an html element.
+
+## NPM Dependencies
+* [react](https://www.npmjs.com/package/react)
+* [react-dom](https://www.npmjs.com/package/react-dom)