Fixed Typo: "Termimal" => "Terminal"

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Closes https://github.com/facebook/react-native/pull/7951

Differential Revision: D3394509

Pulled By: JoelMarcey

fbshipit-source-id: 0ae23950c69ae06a4b85d2e4b577a71e9aa2b7f4

docs/QuickStart-GettingStarted.md

@@ -282,7 +282,7 @@ the Terminal should be something like:
 
 #### Python 2
 
-Fire up the Termimal and use Chocolatey to install Python 2.
+Fire up the Terminal and use Chocolatey to install Python 2.
 
 > Python 3 will currently not work when initializing a React Native project.