chore: bump Spring Boot from 2.7.5 to 2.7.18

[codespearhead]

📜 Description

This update patches at least 13 vulnerabilities according to Maven Central [1].

Additionally, this is the final open-source, vendor-supported version in the Spring Boot 2 release line.

[1] https://mvnrepository.com/artifact/org.springframework.boot/spring-boot
[2] https://spring.io/blog/2023/11/23/spring-boot-2-7-18-available-now#end-of-open-source-support-for-spring-boot-2x

📝 Checklist

• I reviewed the submitted code.
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

[adinauer]

Sorry for the long wait here.