build: bump com.networknt:json-schema-validator from 1.5.5 to 1.5.6 (#4026)

Bumps [com.networknt:json-schema-validator](https://github.com/networknt/json-schema-validator) from 1.5.5 to 1.5.6.
- [Release notes](https://github.com/networknt/json-schema-validator/releases)
- [Changelog](https://github.com/networknt/json-schema-validator/blob/master/CHANGELOG.md)
- [Commits](networknt/json-schema-validator@1.5.5...1.5.6)

---
updated-dependencies:
- dependency-name: com.networknt:json-schema-validator
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -128,7 +128,7 @@
         <version.ecs.logging>1.6.0</version.ecs.logging>
         <version.spring>5.0.15.RELEASE</version.spring>
         <version.jetty-server>9.4.11.v20180605</version.jetty-server>
-        <version.json-schema-validator>1.5.5</version.json-schema-validator>
+        <version.json-schema-validator>1.5.6</version.json-schema-validator>
         <!-- Byte Buddy and ASM must be kept in sync -->
         <version.byte-buddy>1.17.4</version.byte-buddy>
         <version.asm>9.7.1</version.asm>