build(deps): bump co.elastic.logging:logback-ecs-encoder (#1617)

Bumps [co.elastic.logging:logback-ecs-encoder](https://github.com/elastic/ecs-logging-java) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/elastic/ecs-logging-java/releases)
- [Commits](elastic/ecs-logging-java@v1.5.0...v1.6.0)

---
updated-dependencies:
- dependency-name: co.elastic.logging:logback-ecs-encoder
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -90,7 +90,7 @@
         <junit.version>5.10.0</junit.version>
         <aws-embedded-metrics.version>1.0.6</aws-embedded-metrics.version>
         <jmespath.version>0.6.0</jmespath.version>
-        <elastic.version>1.5.0</elastic.version>
+        <elastic.version>1.6.0</elastic.version>
 
         <!-- As we have a .mvn directory at the root of the project, this will evaluate to the root directory
             regardless of where maven is run - sub-module, or root. -->