build(deps): bump org.springframework.boot:spring-boot-starter-log4j2

Bumps [org.springframework.boot:spring-boot-starter-log4j2](https://github.com/spring-projects/spring-boot) from 3.3.2 to 3.4.0.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.2...v3.4.0)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter-log4j2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

serverpackcreator-app/build.gradle.kts

@@ -57,7 +57,7 @@ dependencies {
     api("org.jetbrains.kotlin:kotlin-reflect:1.9.23")
     api("com.fasterxml.jackson.module:jackson-module-kotlin:2.17.1")
     api("org.springframework.boot:spring-boot-starter-web:3.3.2")
-    api("org.springframework.boot:spring-boot-starter-log4j2:3.3.2")
+    api("org.springframework.boot:spring-boot-starter-log4j2:3.4.0")
     api("org.springframework.boot:spring-boot-starter-data-jpa:3.3.5")
     api("org.postgresql:postgresql:42.7.3")
     api("org.javassist:javassist:3.30.2-GA")