Update Spring Boot to 3.1.x

[php-coder]

Changelogs:

• https://spring.io/blog/2023/02/24/spring-boot-3-1-0-m1-available-now
• https://spring.io/blog/2023/03/24/spring-boot-3-1-0-m2-available-now
• https://spring.io/blog/2023/04/22/spring-boot-3-1-0-rc1-available-now
• https://spring.io/blog/2023/05/05/spring-boot-3-1-0-rc2-available-now
• https://spring.io/blog/2023/05/18/spring-boot-3-1-0-available-now
• https://spring.io/blog/2023/06/22/spring-boot-3-1-1-available-now
• https://spring.io/blog/2023/07/20/spring-boot-3-1-2-available-now
• https://spring.io/blog/2023/08/24/spring-boot-3-1-3-available-now
• https://spring.io/blog/2023/09/21/spring-boot-3-1-4-available-now
• https://spring.io/blog/2023/10/19/spring-boot-3-1-5-available-now
• https://spring.io/blog/2023/11/23/spring-boot-3-1-6-available-now
• https://spring.io/blog/2023/12/21/spring-boot-3-1-7-available-now/
• https://spring.io/blog/2024/01/19/spring-boot-3-1-8-available-now
• https://spring.io/blog/2024/02/22/spring-boot-3-1-9-available-now
• https://spring.io/blog/2024/03/21/spring-boot-3-1-10-available-now
• https://spring.io/blog/2024/04/18/spring-boot-3-1-11-available-now
• https://spring.io/blog/2024/05/23/spring-boot-3-1-12-available-now
• https://spring.io/blog/2024/08/23/spring-boot-2-7-21-3-0-16-and-3-1-13-available-now (CVE-2024-38807)
  • https://spring.io/blog/2024/08/23/spring-boot-releases-fix-for-cve-2024-38807
• https://spring.io/blog/2024/11/21/spring-boot-2-7-23-3-0-18-and-3-1-14-available-now
• 3.1.15
• 3.1.16: https://spring.io/blog/2025/04/24/spring-boot-CVE-2025-22235 (CVE-2025-22235)
• https://spring.io/blog/2023/06/19/spring-boot-31-connectiondetails-abstraction
• https://spring.io/blog/2023/06/21/docker-compose-support-in-spring-boot-3-1
• https://spring.io/blog/2023/06/23/improved-testcontainers-support-in-spring-boot-3-1
• https://www.atomicjar.com/2023/05/spring-boot-3-1-0-testcontainers-for-testing-and-local-development/

Should be done after update to 3.0.x (#1553)