Corrected case mistakes

Changed letter 'c' to capital in Visual Studio Code.
Updated check box to checkbox (no space)

Author: Harshagracy

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

@@ -82,7 +82,7 @@ Because the SharePoint client-side solution is HTML/TypeScript based, you can us
 * [Atom](https://atom.io)
 * [Webstorm](https://www.jetbrains.com/webstorm)
 
-SharePoint Framework documentation uses Visual Studio code in the steps and examples. Visual Studio Code is a lightweight but powerful source code editor from Microsoft that runs on your desktop and is available for Windows, Mac, and Linux. It comes with built-in support for JavaScript, TypeScript, and Node.js, and has a rich ecosystem of extensions for other languages (such as C++, C#, Python, PHP) and runtimes.
+SharePoint Framework documentation uses Visual Studio Code in the steps and examples. Visual Studio Code is a lightweight but powerful source code editor from Microsoft that runs on your desktop and is available for Windows, Mac, and Linux. It comes with built-in support for JavaScript, TypeScript, and Node.js, and has a rich ecosystem of extensions for other languages (such as C++, C#, Python, PHP) and runtimes.
 
 ## Preview the web part
 
@@ -223,7 +223,7 @@ When the properties are defined, you can access them in your web part by using `
 
 Notice that we are performing an HTML escape on the property's value to ensure a valid string. To learn more about how to work with the property pane and property pane field types, see [Make your SharePoint client-side web part configurable](../basics/integrate-with-property-pane.md). 
 
-Let's now add a few more properties to the property pane: a check box, a drop-down list, and a toggle. We first start by importing the respective property pane fields from the framework.
+Let's now add a few more properties to the property pane: a checkbox, a drop-down list, and a toggle. We first start by importing the respective property pane fields from the framework.
 
 1. Scroll to the top of the file and add the following to the import section from `@microsoft/sp-property-pane`: