ci-changelog get pr number

[bjlittle]

🚀 Pull Request

Description

This pull-request reverts the use of the jwalton/gh-find-current-pr GHA within the ci-changelog as it was not working for a pull-request sourced from a forked geovista repository (reference #1152).

There are various other GHAs that purport to do this, but sadly this doesn't seem to be the case after experimentation.

Given that the ci-changelog GHA will only be expected to execute based on a pull_request event and not a push, we should be able to simply use github.event.number or github.event.pull_request.number instead.

Let's give it a whirl ...

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.28%. Comparing base (00afb5e) to head (65acc8b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1155   +/-   ##
=======================================
  Coverage   91.28%   91.28%           
=======================================
  Files          58       58           
  Lines        2939     2939           
=======================================
  Hits         2683     2683           
  Misses        256      256           

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