chore: update GitHub Actions to Node 24

[jonathannorris]

Summary

• Update GitHub Actions and custom action dependencies to Node 24-compatible releases.
• Update nested dependencies in composite and custom actions.
• Retain actions without an available Node 24 release.

[Copilot]

Pull request overview

This PR updates several GitHub Actions workflow dependencies to versions intended to be compatible with Node 24, primarily by bumping action major versions across CI, linting, benchmarking, release, and PR-title validation workflows.

Changes:

• Bump actions/setup-python usage from v5 to v7 across workflows.
• Bump amannn/action-semantic-pull-request from v5 to v6.
• Bump actions/checkout from v4 to v7 across workflows (but v7 does not appear to exist for actions/checkout, which will break these workflows).

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
.github/workflows/unit_test.yml	Updates checkout/setup-python action versions for unit test matrix job.
.github/workflows/test_examples.yml	Updates checkout/setup-python action versions for example execution workflow.
.github/workflows/release.yml	Updates checkout/setup-python action versions in the release pipeline.
.github/workflows/lint.yml	Updates checkout/setup-python action versions for lint/format/type-check steps.
.github/workflows/check-semantic.yml	Updates semantic PR title checker action version.
.github/workflows/benchmark.yml	Updates checkout/setup-python action versions for benchmark workflow.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.