Bump @github/relative-time-element from 4.4.8 to 4.5.0

Bumps [@github/relative-time-element](https://github.com/github/relative-time-element) from 4.4.8 to 4.5.0.
- [Release notes](https://github.com/github/relative-time-element/releases)
- [Commits](github/relative-time-element@v4.4.8...v4.5.0)

---
updated-dependencies:
- dependency-name: "@github/relative-time-element"
  dependency-version: 4.5.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]