docs(quickstart): change wording for installing CLI (#3040)

Co-authored-by: Maria Hutt <maria@ionic.io>

Author: Faizanahmedsy

docs/react/quickstart.md

@@ -21,7 +21,7 @@ In this guide, we'll go over the basics of both React and Ionic, including any I
 
 ## Creating a project with the Ionic CLI
 
-To begin, let's install the latest version of the Ionic CLI.
+To get started, let's install the latest version of the Ionic CLI.
 
 ```shell
 npm install -g @ionic/cli

docs/vue/quickstart.md

@@ -21,7 +21,7 @@ In this guide, we will go over the basics of both Vue and Ionic Framework, inclu
 
 ## Creating a project with the Ionic CLI
 
-To begin, let's install the latest version of the Ionic CLI.
+To get started, let's install the latest version of the Ionic CLI.
 
 ```shell
 npm install -g @ionic/cli@latest