Bump org.springframework.boot from 3.3.0 to 3.3.1 in the dependencies group (#60)

* Bump org.springframework.boot in the dependencies group

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


Updates `org.springframework.boot` from 3.3.0 to 3.3.1
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.0...v3.3.1)

---
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>

* Update README.md

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Roger Viñas Alcon <roger.vinas@fastzink.com>

Author: dependabot[bot]

README.md

@@ -1,7 +1,7 @@
 [![CI](https://github.com/rogervinas/spring-immutable-configuration-properties/actions/workflows/gradle.yml/badge.svg?branch=master)](https://github.com/rogervinas/spring-immutable-configuration-properties/actions/workflows/gradle.yml)
 ![Java](https://img.shields.io/badge/Java-21-blue?labelColor=black)
 ![Kotlin](https://img.shields.io/badge/Kotlin-2.0.0-blue?labelColor=black)
-![SpringBoot](https://img.shields.io/badge/SpringBoot-3.3.0-blue?labelColor=black)
+![SpringBoot](https://img.shields.io/badge/SpringBoot-3.3.1-blue?labelColor=black)
 
 # Spring Immutable @ConfigurationProperties
 

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 "3.3.0"
+  id("org.springframework.boot") version "3.3.1"
   id("io.spring.dependency-management") version "1.1.5"
   kotlin("jvm") version "2.0.0"
   kotlin("plugin.spring") version "2.0.0"