docs(readme): add watson dashboard link

Author: mediumTaj

README.md

@@ -189,3 +189,4 @@ See [CONTRIBUTING.md](.github/CONTRIBUTING.md).<TODO revise coding standard>
 [visual-studio-code-download]: https://code.visualstudio.com/
 [dotnet-standard-sdk-documentation]: https://watson-developer-cloud.github.io/dotnet-standard-sdk/
 [ibm-cloud-onboarding]: http://console.bluemix.net/registration?target=/developer/watson&cm_sp=WatsonPlatform-WatsonServices-_-OnPageNavLink-IBMWatson_SDKs-_-DotNet
+[watson-dashboard]: https://console.bluemix.net/dashboard/apps?category=watson