Bump io.spring.javaformat:spring-javaformat-gradle-plugin

Bumps [io.spring.javaformat:spring-javaformat-gradle-plugin](https://github.com/spring-io/spring-javaformat) from 0.0.39 to 0.0.40.
- [Release notes](https://github.com/spring-io/spring-javaformat/releases)
- [Commits](spring-io/spring-javaformat@v0.0.39...v0.0.40)

---
updated-dependencies:
- dependency-name: io.spring.javaformat:spring-javaformat-gradle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

buildSrc/build.gradle

@@ -66,7 +66,7 @@ dependencies {
     implementation 'io.projectreactor:reactor-core:3.4.34'
     implementation 'com.github.ben-manes:gradle-versions-plugin:0.38.0'
     implementation 'com.github.spullara.mustache.java:compiler:0.9.11'
-    implementation 'io.spring.javaformat:spring-javaformat-gradle-plugin:0.0.39'
+    implementation 'io.spring.javaformat:spring-javaformat-gradle-plugin:0.0.40'
     implementation 'io.spring.nohttp:nohttp-gradle:0.0.11'
     implementation 'net.sourceforge.htmlunit:htmlunit:2.37.0'
     implementation 'org.hidetake:gradle-ssh-plugin:2.10.1'