Bump logstash-logback-encoder from 6.6 to 7.2

Bumps [logstash-logback-encoder](https://github.com/logfellow/logstash-logback-encoder) from 6.6 to 7.2.
- [Release notes](https://github.com/logfellow/logstash-logback-encoder/releases)
- [Commits](logfellow/logstash-logback-encoder@logstash-logback-encoder-6.6...logstash-logback-encoder-7.2)

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

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

Author: dependabot[bot]

build.gradle.kts

@@ -1,7 +1,7 @@
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 val mockkVersion = "1.12.7"
-val logstashVersion = "6.6"
+val logstashVersion = "7.2"
 val springVersion = "2.5.5"
 val testContainersVersion = "1.17.3"
 val springFoxVersion = "3.0.0"