Correct typo in IDE 2.x upload process introduction

A copy/paste error resulted in irrelevant mention of "Installing a core" in the introductory sentence for the sketch upload procedure.

Author: per1234

Diff for: content/software/ide-v2/tutorials/getting-started/02.ide-v2-uploading-a-sketch/ide-v2-uploading-a-sketch.md

@@ -28,7 +28,7 @@ A good practice is to use the verifying tool before attempting to upload anythin
 
 ### Uploading a Sketch
 
-Installing a core is quick and easy, but let's take a look at what we need to do. 
+Uploading a sketch is quick and easy, but let's take a look at what we need to do. 
 
 **1.** Open the Arduino IDE 2.0.