Bump metrics-healthchecks from 4.2.7 to 4.2.8

Bumps [metrics-healthchecks](https://github.com/dropwizard/metrics) from 4.2.7 to 4.2.8.
- [Release notes](https://github.com/dropwizard/metrics/releases)
- [Commits](dropwizard/metrics@v4.2.7...v4.2.8)

---
updated-dependencies:
- dependency-name: io.dropwizard.metrics:metrics-healthchecks
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -335,7 +335,7 @@
     <dependency>
       <groupId>io.dropwizard.metrics</groupId>
       <artifactId>metrics-healthchecks</artifactId>
-      <version>4.2.7</version>
+      <version>4.2.8</version>
       <scope>test</scope>
     </dependency>
   </dependencies>