build(deps): bump logstash-logback-encoder from 4.11 to 6.6 (#143)

Bumps [logstash-logback-encoder](https://github.com/logstash/logstash-logback-encoder) from 4.11 to 6.6.
- [Release notes](https://github.com/logstash/logstash-logback-encoder/releases)
- [Commits](https://github.com/logstash/logstash-logback-encoder/compare/logstash-logback-encoder-4.11...logstash-logback-encoder-6.6)

---
updated-dependencies:
- dependency-name: net.logstash.logback:logstash-logback-encoder
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

pom.xml

@@ -104,7 +104,7 @@
         <specification.version>1.0-beta2</specification.version>
         <?SORTPOM RESUME?>
         <license_copyrightOwner>Red Hat, Inc.</license_copyrightOwner>
-        <logstash.logback.encoder.version>4.11</logstash.logback.encoder.version>
+        <logstash.logback.encoder.version>6.6</logstash.logback.encoder.version>
         <maven.antrun.plugin.version>3.0.0</maven.antrun.plugin.version>
         <maven.assembly.plugin.version>3.3.0</maven.assembly.plugin.version>
         <maven.buildhelper.plugin.version>3.2.0</maven.buildhelper.plugin.version>