Update spelling: Getting Start to Getting Started

Author: chuggingCoffee

guides/source/getting_started.md

@@ -65,7 +65,7 @@ Creating a New Rails Project
 ----------------------------
 
 TIP: New Rails apps come with a preconfigured Dev Container development environment. This
-is the fastest way to get started with Rails. For instructions see [Getting Start with Dev Containers](getting_started_with_devcontainer.html)
+is the fastest way to get started with Rails. For instructions see [Getting Started with Dev Containers](getting_started_with_devcontainer.html)
 
 The best way to read this guide is to follow it step by step. All steps are
 essential to run this example application and no additional code or steps are