chore: bump org.springframework.boot from 3.4.1 to 3.4.2 in /dgs-client (#3110)

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.4.1 to 3.4.2.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.4.1...v3.4.2)

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

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Author: dependabot[bot]

dgs-client/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '3.4.1'
+    id 'org.springframework.boot' version '3.4.2'
     id 'io.spring.dependency-management' version '1.1.7'
     id 'java'
     id "com.netflix.dgs.codegen" version "7.0.3" //https://plugins.gradle.org/plugin/com.netflix.dgs.codegen