fix: autoapproval triggers script fails with invalid input text r #499

[rabadiw]

A fix for issue #499.

[alexgraham-da]

I don't think it's a bad idea to update the syntax to yq 4.x since it is the latest version, but if you are going to do so, please update the README.md requirements and make sure other yq calls in the scripts match the new syntax as well.