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

Bumps [org.springframework.boot:spring-boot-gradle-plugin](https://github.com/spring-projects/spring-boot) from 3.5.4 to 3.5.5.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.5.4...v3.5.5)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-gradle-plugin
  dependency-version: 3.5.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

junit5-spring-boot-rest/build.gradle

@@ -1,6 +1,6 @@
 buildscript {
     ext {
-        springBootVersion = '3.5.4'
+        springBootVersion = '3.5.5'
     }
     repositories {
         mavenCentral()

junit5-spring-boot-web/build.gradle

@@ -1,6 +1,6 @@
 buildscript {
     ext {
-        springBootVersion = '3.5.4'
+        springBootVersion = '3.5.5'
     }
     repositories {
         mavenCentral()

junit5-spring-boot/build.gradle

@@ -1,6 +1,6 @@
 buildscript {
     ext {
-        springBootVersion = '3.5.4'
+        springBootVersion = '3.5.5'
     }
     repositories {
         mavenCentral()