Bump org.springframework.boot from 2.7.3 to 3.4.3

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 2.7.3 to 3.4.3.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.3...v3.4.3)

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

settings.gradle

@@ -16,7 +16,7 @@ pluginManagement {
     }
     plugins {
         //id 'io.spring.dependency-management' version '1.0.10.RELEASE'
-        id 'org.springframework.boot' version '2.7.3'
+        id 'org.springframework.boot' version '3.4.3'
         id 'com.github.johnrengelman.shadow' version '7.1.2'
         id 'de.jjohannes.java-ecosystem-capabilities' version '0.4'
     }