Bump bstatsVersion from 3.1.0 to 3.2.1 in /Plan (#4479)

Bumps `bstatsVersion` from 3.1.0 to 3.2.1.

Updates `org.bstats:bstats-bukkit` 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)

Updates `org.bstats:bstats-sponge` 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)

Updates `org.bstats:bstats-bungeecord` 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-bukkit
  dependency-version: 3.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.bstats:bstats-sponge
  dependency-version: 3.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.bstats:bstats-bungeecord
  dependency-version: 3.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Plan/build.gradle

@@ -86,7 +86,7 @@ subprojects {
         ipAddressMatcherVersion = "5.6.1"
         jasyptVersion = "1.9.3"
 
-        bstatsVersion = "3.1.0"
+        bstatsVersion = "3.2.1"
         placeholderapiVersion = "2.11.5"
         nkPlaceholderapiVersion = "1.4-SNAPSHOT"