Bump io.spring.nullability:io.spring.nullability.gradle.plugin

Bumps [io.spring.nullability:io.spring.nullability.gradle.plugin](https://github.com/spring-gradle-plugins/nullability-plugin) from 0.0.5 to 0.0.6.
- [Release notes](https://github.com/spring-gradle-plugins/nullability-plugin/releases)
- [Commits](https://github.com/spring-gradle-plugins/nullability-plugin/compare/v0.0.5...v0.0.6)

---
updated-dependencies:
- dependency-name: io.spring.nullability:io.spring.nullability.gradle.plugin
  dependency-version: 0.0.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

gradle/libs.versions.toml

@@ -100,7 +100,7 @@ org-jfrog-buildinfo-build-info-extractor-gradle = "org.jfrog.buildinfo:build-inf
 org-sonarsource-scanner-gradle-sonarqube-gradle-plugin = "org.sonarsource.scanner.gradle:sonarqube-gradle-plugin:2.8.0.1969"
 org-instancio-instancio-junit = "org.instancio:instancio-junit:3.7.1"
 
-spring-nullability = 'io.spring.nullability:io.spring.nullability.gradle.plugin:0.0.5'
+spring-nullability = 'io.spring.nullability:io.spring.nullability.gradle.plugin:0.0.6'
 webauthn4j-core = 'com.webauthn4j:webauthn4j-core:0.29.7.RELEASE'
 com-password4j-password4j = { module = "com.password4j:password4j", version.ref = "com-password4j" }