build: bump semver from 7.5.0 to 7.5.3 in /tools/lint-md

Bumps [semver](https://github.com/npm/node-semver) from 7.5.0 to 7.5.3.
- [Release notes](https://github.com/npm/node-semver/releases)
- [Changelog](https://github.com/npm/node-semver/blob/main/CHANGELOG.md)
- [Commits](npm/node-semver@v7.5.0...v7.5.3)

---
updated-dependencies:
- dependency-name: semver
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]