Update content/learn/01.starting-guide/00.getting-started-arduino/getting-started-arduino.md

Co-authored-by: Josefine Hansson <[email protected]>

Author: karlsoderby

content/learn/01.starting-guide/00.getting-started-arduino/getting-started-arduino.md

@@ -284,7 +284,7 @@ The above functions are **always** required in an Arduino sketch, but you are of
 
 ### The "Sketch"
 
-In the Arduino project, a program is referred to as a "Sketch". A sketch is a file that you write your program inside. It has the `.ino` extension, and is always stored in a folder of the same name. 
+In the Arduino project, a program is referred to as a "sketch". A sketch is a file that you write your program inside. It has the `.ino` extension, and is always stored in a folder of the same name. 
 
 The folder can include other files, such as a **header file**, that can be included in your sketch.