build(deps): bump logstash-logback-encoder from 7.2 to 7.3

Bumps [logstash-logback-encoder](https://github.com/logfellow/logstash-logback-encoder) from 7.2 to 7.3.
- [Release notes](https://github.com/logfellow/logstash-logback-encoder/releases)
- [Commits](logfellow/logstash-logback-encoder@logstash-logback-encoder-7.2...logstash-logback-encoder-7.3)

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

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

pom.xml

@@ -104,7 +104,7 @@
     <dependency>
       <groupId>net.logstash.logback</groupId>
       <artifactId>logstash-logback-encoder</artifactId>
-      <version>7.2</version>
+      <version>7.3</version>
     </dependency>
     <dependency>
       <groupId>nz.net.ultraq.thymeleaf</groupId>