Bump org.hdrhistogram:HdrHistogram from 2.1.12 to 2.2.1

Bumps [org.hdrhistogram:HdrHistogram](https://github.com/HdrHistogram/HdrHistogram) from 2.1.12 to 2.2.1.
- [Release notes](https://github.com/HdrHistogram/HdrHistogram/releases)
- [Commits](HdrHistogram/HdrHistogram@HdrHistogram-2.1.12...HdrHistogram-2.2.1)

---
updated-dependencies:
- dependency-name: org.hdrhistogram:HdrHistogram
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -355,7 +355,7 @@
     <dependency>
       <groupId>org.hdrhistogram</groupId>
       <artifactId>HdrHistogram</artifactId>
-      <version>2.1.12</version>
+      <version>2.2.1</version>
       <scope>test</scope>
     </dependency>
     <dependency>