Bump springBootVersion from 3.2.5 to 3.2.6

Bumps `springBootVersion` from 3.2.5 to 3.2.6.

Updates `org.springframework.boot:spring-boot-gradle-plugin` from 3.2.5 to 3.2.6
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.2.5...v3.2.6)

Updates `org.springframework.boot:spring-boot-configuration-metadata` from 3.2.5 to 3.2.6
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.2.5...v3.2.6)

---
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-configuration-metadata
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

buildSrc/build.gradle

@@ -7,7 +7,7 @@ repositories {
     maven { url 'https://repo.spring.io/milestone' }
 }
 
-def springBootVersion = "3.2.5"
+def springBootVersion = "3.2.6"
 
 dependencies {
     api "org.springframework.boot:spring-boot-gradle-plugin:$springBootVersion"