Bump org.springframework.boot:spring-boot-gradle-plugin

Bumps [org.springframework.boot:spring-boot-gradle-plugin](https://github.com/spring-projects/spring-boot) from 3.4.1 to 3.5.4.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.4.1...v3.5.4)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-gradle-plugin
  dependency-version: 3.5.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

server/build.gradle

@@ -7,14 +7,14 @@ buildscript {
     }
     dependencies {
         classpath 'io.spring.gradle:dependency-management-plugin:1.1.7'
-        classpath 'org.springframework.boot:spring-boot-gradle-plugin:3.5.4'
+        classpath 'org.springframework.boot:spring-boot-gradle-plugin:3.5.5'
     }
 }
 
 plugins {
     id 'java'
     id 'idea'
-    id 'org.springframework.boot' version '3.5.4'
+    id 'org.springframework.boot' version '3.5.5'
     id 'jacoco'
 }