Bump springBootVersion from 3.1.3 to 3.1.4

Bumps `springBootVersion` from 3.1.3 to 3.1.4.

Updates `org.springframework.boot:spring-boot-gradle-plugin` from 3.1.3 to 3.1.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.3...v3.1.4)

Updates `org.springframework.boot:spring-boot-starter-web` from 3.1.3 to 3.1.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.3...v3.1.4)

Updates `org.springframework.boot:spring-boot-starter-thymeleaf` from 3.1.3 to 3.1.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.3...v3.1.4)

Updates `org.springframework.boot:spring-boot-starter-test` from 3.1.3 to 3.1.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.3...v3.1.4)

Updates `org.springframework.boot:spring-boot-configuration-processor` from 3.1.3 to 3.1.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.3...v3.1.4)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-gradle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-starter-web
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-starter-thymeleaf
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-starter-test
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-configuration-processor
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -1,6 +1,6 @@
 buildscript {
     ext {
-        springBootVersion = '3.1.3'
+        springBootVersion = '3.1.4'
         springVersion = '6.0.11'
         tomcatVersion = '10.1.13'
         seleniumVersion = '4.12.1'