[deps]: Bump org.springframework.boot:spring-boot-dependencies

Bumps [org.springframework.boot:spring-boot-dependencies](https://github.com/spring-projects/spring-boot) from 3.3.6 to 3.4.3.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.6...v3.4.3)

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

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

Author: dependabot[bot]

build.gradle

@@ -11,7 +11,7 @@ plugins {
 }
 
 ext {
-    springBootVersion = "3.3.6"
+    springBootVersion = "3.4.3"
     springBootShellVersion = "3.3.3"
 
     avroVersion = "1.12.0"