Bump spring-boot from 4.0.6-SNAPSHOT to 4.0.6

Bumps `spring-boot` from 4.0.6-SNAPSHOT to 4.0.6.

Updates `org.springframework.boot:spring-boot-starter-amqp` from 4.0.6-SNAPSHOT to 4.0.6
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/commits/v4.0.6)

Updates `org.springframework.boot:spring-boot-starter-pulsar` from 4.0.6-SNAPSHOT to 4.0.6
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/commits/v4.0.6)

Updates `org.springframework.boot:spring-boot-starter-test` from 4.0.6-SNAPSHOT to 4.0.6
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/commits/v4.0.6)

Updates `org.springframework.boot:spring-boot-testcontainers` from 4.0.6-SNAPSHOT to 4.0.6
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/commits/v4.0.6)

Updates `org.springframework.boot` from 4.0.6-SNAPSHOT to 4.0.6
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/commits/v4.0.6)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter-amqp
  dependency-version: 4.0.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-starter-pulsar
  dependency-version: 4.0.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-starter-test
  dependency-version: 4.0.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-testcontainers
  dependency-version: 4.0.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot
  dependency-version: 4.0.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -21,7 +21,7 @@ junit = "6.0.3"
 hamcrest = "3.0"
 mockito = "5.20.0"
 spring-dep-mgmt = "1.1.7"
-spring-boot = "4.0.6-SNAPSHOT"
+spring-boot = "4.0.6"
 spring-boot-for-docs = "4.0.6"
 spring-cloud-stream = "5.0.0-SNAPSHOT"
 system-lambda = "1.2.1"