Bump com.approvaltests:approvaltests from 25.4.3 to 25.6.0

Bumps [com.approvaltests:approvaltests](https://github.com/approvals/ApprovalTests.Java) from 25.4.3 to 25.6.0.
- [Release notes](https://github.com/approvals/ApprovalTests.Java/releases)
- [Changelog](https://github.com/approvals/ApprovalTests.Java/blob/master/internal_documentation/release.md)
- [Commits](approvals/ApprovalTests.Java@25.4.3...25.6.0)

---
updated-dependencies:
- dependency-name: com.approvaltests:approvaltests
  dependency-version: 25.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

bom/pom.xml

@@ -66,7 +66,7 @@ identified
         <asciidoctorj.version>3.0.0</asciidoctorj.version>
         <asm.version>9.9</asm.version> <!-- keep in sync with
         org.eclipse.persistence:org.eclipse.persistence.asm -->
-        <approvaltests.version>25.4.3</approvaltests.version>
+        <approvaltests.version>25.6.0</approvaltests.version>
 
         <assertj-guava.version>3.27.6</assertj-guava.version>