Bump org.bstats:bstats-velocity from 3.1.0 to 3.2.1 (#20)

Bumps [org.bstats:bstats-velocity](https://github.com/Bastian/bStats-Metrics) from 3.1.0 to 3.2.1.
- [Release notes](https://github.com/Bastian/bStats-Metrics/releases)
- [Commits](Bastian/bstats-metrics@v3.1.0...v3.2.1)

---
updated-dependencies:
- dependency-name: org.bstats:bstats-velocity
  dependency-version: 3.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]