Update README.md

Fix typo: is => if

diff --git a/README.md b/README.md
index a14093722bd1758da57146aca8d69be8a587e268..e45dd1da3c16534d54aaa7625730e064106cf511 100644 (file)
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ npm install
 npm start
 ```
 
-Then open http://0.0.0.0:3000 in a web browser (use http://127.0.0.1:3000 is running under Windows).
+Then open http://0.0.0.0:3000 in a web browser (use http://127.0.0.1:3000 if running under Windows).
 
 ## Addons