Bump io.smallrye:smallrye-metrics from 4.0.0 to 5.1.0

Bumps [io.smallrye:smallrye-metrics](https://github.com/smallrye/smallrye-metrics) from 4.0.0 to 5.1.0.
- [Release notes](https://github.com/smallrye/smallrye-metrics/releases)
- [Commits](smallrye/smallrye-metrics@4.0.0...5.1.0)

---
updated-dependencies:
- dependency-name: io.smallrye:smallrye-metrics
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

pom.xml

@@ -54,7 +54,7 @@
         <!-- smallrye-config is purely used for testing -->
         <version.smallrye-config>3.4.1</version.smallrye-config>
         <!-- smallrye-metrics is purely used for testing -->
-        <version.smallrye-metrics>4.0.0</version.smallrye-metrics>
+        <version.smallrye-metrics>5.1.0</version.smallrye-metrics>
         <!-- smallrye-context-propagation is purely used for testing -->
         <version.smallrye-context-propagation>2.1.0</version.smallrye-context-propagation>
         <version.smallrye-common>2.2.0</version.smallrye-common>