Bump org.springframework.boot

Bumps the dependencies group in /sample-api-server with 1 update: [org.springframework.boot](https://github.com/spring-projects/spring-boot).


Updates `org.springframework.boot` from 3.3.3 to 3.3.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.3...v3.3.4)

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

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

sample-api-server/build.gradle.kts

@@ -4,7 +4,7 @@ import org.gradle.api.tasks.testing.logging.TestLogEvent.PASSED
 import org.gradle.api.tasks.testing.logging.TestLogEvent.SKIPPED
 
 plugins {
-  id("org.springframework.boot") version "3.3.3"
+  id("org.springframework.boot") version "3.3.4"
   id("io.spring.dependency-management") version "1.1.6"
   kotlin("jvm") version "2.0.20"
   kotlin("plugin.spring") version "2.0.20"