Bump io.github.elf4j:elf4j-engine from 15.2.0 to 15.2.1

Bumps [io.github.elf4j:elf4j-engine](https://github.com/elf4j/elf4j-engine) from 15.2.0 to 15.2.1.
- [Release notes](https://github.com/elf4j/elf4j-engine/releases)
- [Commits](elf4j/elf4j-engine@15.2.0...15.2.1)

---
updated-dependencies:
- dependency-name: io.github.elf4j:elf4j-engine
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -72,7 +72,7 @@
         <dependency>
             <groupId>io.github.elf4j</groupId>
             <artifactId>elf4j-engine</artifactId>
-            <version>15.2.0</version>
+            <version>15.2.1</version>
         </dependency>
         <dependency>
             <groupId>org.projectlombok</groupId>