build(deps): bump spring-boot.version from 2.7.5 to 3.1.2

Bumps `spring-boot.version` from 2.7.5 to 3.1.2.

Updates `org.springframework.boot:spring-boot-dependencies` from 2.7.5 to 3.1.2
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.5...v3.1.2)

Updates `org.springframework.boot:spring-boot-starter-test` from 2.7.5 to 3.1.2
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.5...v3.1.2)

Updates `org.springframework.boot:spring-boot-maven-plugin` from 2.7.5 to 3.1.2
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.5...v3.1.2)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-dependencies
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.springframework.boot:spring-boot-starter-test
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.springframework.boot:spring-boot-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

pom.xml

@@ -20,7 +20,7 @@
         <openrewrite.version>7.35.0</openrewrite.version>
         <openrewrite.spring.version>4.32.0</openrewrite.spring.version>
         <rewrite-migrate-java.version>1.17.0</rewrite-migrate-java.version>
-        <spring-boot.version>2.7.5</spring-boot.version>
+        <spring-boot.version>3.1.2</spring-boot.version>
         <progressbar.version>0.9.5</progressbar.version>
         <testcontainers.version>1.17.6</testcontainers.version>
         <maven-invoker.version>3.2.0</maven-invoker.version>