Change GitHub Action digest pinning strategy to semver

[thompson-tomo]

This PR

• switches github action pinning to semver which forces all actions to appear as @{{digest}} # vX.Y.Z instead of @{{digest}} # vX or however it was defined. It also enables updates to be correctly classified as patch/minor rather than just digest
• this improves readabiloty

Notes

see config option defined at https://docs.renovatebot.com/presets-helpers/

a number of occurrences are already pinning to semver but others don’t

[coderabbitai]

📝 Walkthrough

Walkthrough

The Renovate helper preset in default.json now uses semver-based GitHub Action digest pinning.

Changes

Renovate preset update

Layer / File(s)	Summary
Update GitHub Action digest preset default.json	Replaces helpers:pinGitHubActionDigests with helpers:pinGitHubActionDigestsToSemver.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly describes the change to the GitHub Action digest pinning strategy.
Description check	✅ Passed	The description explains the semver pinning change and its effect on version display and update classification.

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