chore: DEVPLAT-7373 fix Node.js 20 deprecated GitHub Actions

[kristianmills]

Summary

Upgrades GitHub Actions that use the deprecated Node.js 20 runtime to Node.js 24 compatible versions.

Node.js 20 actions will be forced to run on Node.js 24 by default starting June 2nd, 2026. See the GitHub deprecation notice.

Changes made:

• cycjimmy/semantic-release-action@v4 → cycjimmy/semantic-release-action@v5

🤖 Generated with Claude Code

DEVPLAT-7373

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Note

Low Risk
Low risk workflow-only dependency bumps; main risk is minor behavior differences between major action versions affecting release or PR-title validation.

Overview
Updates CI workflows to use newer major versions of GitHub Actions: cycjimmy/semantic-release-action is bumped from v4 to v5 in the release workflow, and amannn/action-semantic-pull-request is bumped from v5.4.0 to v6 for PR title validation.

No application/runtime code changes; this is strictly workflow maintenance for compatibility with newer GitHub-hosted runner Node versions.

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