Bump react-countup from 6.1.1 to 6.4.2

Bumps [react-countup](https://github.com/glennreyes/react-countup) from 6.1.1 to 6.4.2.
- [Release notes](https://github.com/glennreyes/react-countup/releases)
- [Commits](glennreyes/react-countup@v6.1.1...v6.4.2)

---
updated-dependencies:
- dependency-name: react-countup
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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