Feature Request: if propertyPath does not already exist, do not create it

[shay-ul]

Hey!
I wanted to ask for a simple feature that can help us a lot - "Update only" instead of "Update and create if property does not exist".
Right now, if propertyPath does not actually exist, this action will create the propery (and it's entire path!) with the new value. I want to be able to fail this action if the propery does not exist.

[fjogeleit]

Hey, I will have a look on it.

[fjogeleit]

I added a new input, called method. The values are explained in the README

https://github.com/fjogeleit/yaml-update-action#methods

With the method Update, it will only change the value if it exists and skip if not. Let me know if it does not work as expected,

[shay-ul]

Thank you! this is awesome