Bump joinfaces.version from 5.1.5 to 5.1.6

Bumps `joinfaces.version` from 5.1.5 to 5.1.6.

Updates `org.joinfaces:joinfaces-dependencies` from 5.1.5 to 5.1.6
- [Release notes](https://github.com/joinfaces/joinfaces/releases)
- [Commits](joinfaces/joinfaces@5.1.5...5.1.6)

Updates `org.joinfaces:joinfaces-maven-plugin` from 5.1.5 to 5.1.6
- [Release notes](https://github.com/joinfaces/joinfaces/releases)
- [Commits](joinfaces/joinfaces@5.1.5...5.1.6)

---
updated-dependencies:
- dependency-name: org.joinfaces:joinfaces-dependencies
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.joinfaces:joinfaces-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -21,7 +21,7 @@
     <properties>
         <!-- compile library versions -->
         <jakarta.validation-api.version>3.0.2</jakarta.validation-api.version>
-        <joinfaces.version>5.1.5</joinfaces.version>
+        <joinfaces.version>5.1.6</joinfaces.version>
         <maven-model.version>3.9.6</maven-model.version>
 
         <!-- test library versions -->