Update README.md

Author: prateektc

README.md

@@ -48,7 +48,7 @@ travelProvider.exec("doBooking",  new JSONObject() {{
 });
 ```
 
-## API Endpoint ( https://microapps.appsfly.io/executor/exec )
+## API Endpoint ( "https://microapps.appsfly.io/executor/exec" )
 
 appsfly.io exposes a single API endpoint to access Microservices directly. Headers are used for authentication and sessions will be managed accordingly.