Inconsistent code block spacing

[swierczek]

Description of the problem
Remove leading spaces in code blocks on https://docs.expressionengine.com/latest/development/add-on-update-file.html

The code blocks on this page are inconsistently indented, which makes copy/paste less than ideal.

• Under Properties, each line has an extra 4 spaces
• Under Install Your Add-On (install()), the first line has 3 spaces, while the others have 4
• Under Adding Publish Tabs, each line has an extra 2 spaces
• Under Removing Tabs, each line has an extra 2 spaces