[bot][8.13.x]: Bump version.org.springframework.boot from 2.6.6 to 3.4.0

Bumps `version.org.springframework.boot` from 2.6.6 to 3.4.0.

Updates `org.springframework.boot:spring-boot-autoconfigure` from 2.6.6 to 3.4.0
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.6.6...v3.4.0)

Updates `org.springframework.boot:spring-boot-autoconfigure-processor` from 2.6.6 to 3.4.0
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.6.6...v3.4.0)

Updates `org.springframework.boot:spring-boot-configuration-processor` from 2.6.6 to 3.4.0
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.6.6...v3.4.0)

Updates `org.springframework.boot:spring-boot-test` from 2.6.6 to 3.4.0
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.6.6...v3.4.0)

Updates `org.springframework.boot:spring-boot-test-autoconfigure` from 2.6.6 to 3.4.0
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.6.6...v3.4.0)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-autoconfigure
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.springframework.boot:spring-boot-autoconfigure-processor
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.springframework.boot:spring-boot-configuration-processor
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.springframework.boot:spring-boot-test
  dependency-type: direct:development
  update-type: version-update:semver-major
- dependency-name: org.springframework.boot:spring-boot-test-autoconfigure
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

build/optaplanner-build-parent/pom.xml

@@ -33,7 +33,7 @@
     <version.org.jdom>1.1.3</version.org.jdom>
     <version.org.jfree.jfreechart>1.5.3</version.org.jfree.jfreechart>
     <version.org.springframework>5.3.18</version.org.springframework>
-    <version.org.springframework.boot>2.6.6</version.org.springframework.boot>
+    <version.org.springframework.boot>3.4.0</version.org.springframework.boot>
     <version.org.assertj>3.22.0</version.org.assertj>
     <version.com.github.javaparser>3.23.1</version.com.github.javaparser> <!-- Keep align with Drools 7 -->