chore(deps): bump net.logstash.logback:logstash-logback-encoder

Bumps [net.logstash.logback:logstash-logback-encoder](https://github.com/logfellow/logstash-logback-encoder) from 8.1 to 9.0.
- [Release notes](https://github.com/logfellow/logstash-logback-encoder/releases)
- [Commits](logfellow/logstash-logback-encoder@logstash-logback-encoder-8.1...logstash-logback-encoder-9.0)

---
updated-dependencies:
- dependency-name: net.logstash.logback:logstash-logback-encoder
  dependency-version: '9.0'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -5,7 +5,7 @@ spring-dependency-managment = "1.1.7"
 springdoc = "2.8.13"
 aws-serverless-java-container-springboot3 = "2.1.5"
 junit = "4.13.2"
-logstash-logback-encoder = "8.1"
+logstash-logback-encoder = "9.0"
 kotlinx-coroutines = "1.7.3"
 kotlinx-coroutines-test = "1.6.4"
 kotlinx-datetime = "0.7.1-0.6.x-compat"