Chore: Enable the image cleanup action

[stumpylog]

Proposed change

Not sure when I disabled this, but the old image cleaner wasn't actually doing the cleaning. Probably when I switched us over to the action from the mess of scripts, etc

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other (please explain)

Checklist:

• I have read & agree with the contributing guidelines.
• If applicable, I have tested my code for new features & regressions on both mobile & desktop devices, using the latest version of major browsers.
• If applicable, I have checked that all tests pass, see documentation.
• I have run all pre-commit hooks, see documentation.
• I have made corresponding changes to the documentation as needed.
• I have checked my modifications for any breaking changes.

[shamoon]

Ha, would've taken ages to notice this, thanks

[stumpylog]

Yeah, I hadn't noticed it myself.

[github-actions]

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