chore(deps): bump springBootVersion from 2.5.5 to 2.5.6 (#116)

Bumps `springBootVersion` from 2.5.5 to 2.5.6.

Updates `spring-boot-starter-webflux` from 2.5.5 to 2.5.6
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.5.5...v2.5.6)

Updates `spring-boot-starter-oauth2-resource-server` from 2.5.5 to 2.5.6
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.5.5...v2.5.6)

Updates `spring-boot-starter-oauth2-client` from 2.5.5 to 2.5.6
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.5.5...v2.5.6)

Updates `spring-boot-starter-test` from 2.5.5 to 2.5.6
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.5.5...v2.5.6)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter-webflux
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-starter-oauth2-resource-server
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-starter-oauth2-client
  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
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

build.gradle.kts

@@ -13,7 +13,7 @@ val kotlinVersion = "1.5.31"
 val freemarkerVersion = "2.3.31"
 val kotestVersion = "4.6.3"
 val bouncyCastleVersion = "1.69"
-val springBootVersion = "2.5.5"
+val springBootVersion = "2.5.6"
 val reactorTestVersion = "3.4.11"
 val ktorVersion = "1.6.4"