github workflow not supported

[climba03003]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the regression has not already been reported

Last working version

3.0.2

Stopped working in version

3.1.0

Node.js version

/

Operating system

Linux

Operating system version (i.e. 20.04, 11.3, 10)

/

💥 Regression Report

I think it should fallback to title regex when no package.json is found on diff.
Of cuz, it should not allow to upgrade if the title do not match which is different then before.

Steps to Reproduce

fastify/fastify#3825

Expected Behavior

github workflow should be supported.

[simoneb]

good catch, caused by not having good enough code coverage which we're addressing now