Bump com.fasterxml.jackson:jackson-bom from 2.19.2 to 2.21.1

Bumps [com.fasterxml.jackson:jackson-bom](https://github.com/FasterXML/jackson-bom) from 2.19.2 to 2.21.1.
- [Commits](FasterXML/jackson-bom@jackson-bom-2.19.2...jackson-bom-2.21.1)

---
updated-dependencies:
- dependency-name: com.fasterxml.jackson:jackson-bom
  dependency-version: 2.21.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -70,7 +70,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
         <!-- Runtime dependencies (aligned with Spring Boot 3.5.12) -->
-        <jackson.version>2.19.4</jackson.version>
+        <jackson.version>2.21.2</jackson.version>
         <slf4j.version>2.0.17</slf4j.version>
         <logback.version>1.5.32</logback.version>
         <log4j2.version>2.25.3</log4j2.version>