Fixed missing space between words

Fixed missing space between words. In addition to that the line "You can preview and test your client-side web part locally on your questions." doesn't look correct "on your questions"? does it mean on your workbench, i think this needs to be corrected.

Author: annajhaveri

docs/spfx/web-parts/get-started/build-a-hello-world-web-part.md

@@ -370,7 +370,7 @@ SharePoint Workbench is also hosted in SharePoint to preview and test your local
 1. Go to the following URL: **https://your-sharepoint-tenant.sharepoint.com/_layouts/workbench.aspx**
 
     > [!NOTE]
-    > If you do not have the SPFx developer certificate installed, Workbench notifies you that it is configured not to load scripts from localhost. Stop the currently running process in the console window, and execute the **gulp trust-dev-cert** command in your project directory console to install the developer certificate before running the **gulp serve**command again. For more information, see [Trusting the self-signed developer certificate](../../set-up-your-development-environment.md#trusting-the-self-signed-developer-certificate)
+    > If you do not have the SPFx developer certificate installed, Workbench notifies you that it is configured not to load scripts from localhost. Stop the currently running process in the console window, and execute the **gulp trust-dev-cert** command in your project directory console to install the developer certificate before running the **gulp serve** command again. For more information, see [Trusting the self-signed developer certificate](../../set-up-your-development-environment.md#trusting-the-self-signed-developer-certificate)
 
     ![SharePoint Workbench running in a SharePoint Online site](../../../images/sp-workbench-o365.png)