Bump io.spring.develocity.conventions from 0.0.20 to 0.0.21 (#5502)

Bumps [io.spring.develocity.conventions](https://github.com/spring-io/develocity-conventions) from 0.0.20 to 0.0.21.
- [Release notes](https://github.com/spring-io/develocity-conventions/releases)
- [Commits](spring-io/develocity-conventions@v0.0.20...v0.0.21)

---
updated-dependencies:
- dependency-name: io.spring.develocity.conventions
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

settings.gradle

@@ -6,7 +6,7 @@ pluginManagement {
 
 plugins {
     id 'com.gradle.develocity' version '3.17.6'
-    id 'io.spring.develocity.conventions' version '0.0.20'
+    id 'io.spring.develocity.conventions' version '0.0.21'
     id 'org.gradle.toolchains.foojay-resolver-convention' version '0.8.0'
 }