[maven] Bump kamon.version from 2.7.1 to 2.7.3

Bumps `kamon.version` from 2.7.1 to 2.7.3.

Updates `io.kamon:kamon-bundle_2.13` from 2.7.1 to 2.7.3
- [Release notes](https://github.com/kamon-io/Kamon/releases)
- [Commits](kamon-io/Kamon@v2.7.1...v2.7.3)

Updates `io.kamon:kamon-influxdb_2.13` from 2.7.1 to 2.7.3
- [Release notes](https://github.com/kamon-io/Kamon/releases)
- [Commits](kamon-io/Kamon@v2.7.1...v2.7.3)

---
updated-dependencies:
- dependency-name: io.kamon:kamon-bundle_2.13
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: io.kamon:kamon-influxdb_2.13
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

rika2mqtt-flux-metrics-plugin/pom.xml

@@ -40,7 +40,7 @@
         <maven.compiler.source>${java.sdk.version}</maven.compiler.source>
         <maven.compiler.target>${java.sdk.version}</maven.compiler.target>
         <project.build.sourceEncoding>${source.encoding}</project.build.sourceEncoding>
-        <kamon.version>2.7.1</kamon.version>
+        <kamon.version>2.7.3</kamon.version>
         <!-- sonar analysis -->
         <sonar.projectKey>${project.sonar.root.projectKey}-${project.groupId}-${project.artifactId}</sonar.projectKey>
     </properties>