Update tryghost/actions digest to a4d20ca

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
tryghost/actions (changelog)	action	digest	483e476 → a4d20ca

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (702eacf) to head (77f2951).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #1030   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           30        30           
  Lines         3060      3060           
  Branches       459       459           
=========================================
  Hits          3060      3060           

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