Bump io.spring.nullability in the development-dependencies group (#3169)

Bumps the development-dependencies group with 1 update: [io.spring.nullability](https://github.com/spring-gradle-plugins/nullability-plugin).


Updates `io.spring.nullability` from 0.0.2 to 0.0.4
- [Release notes](https://github.com/spring-gradle-plugins/nullability-plugin/releases)
- [Commits](spring-gradle-plugins/nullability-plugin@v0.0.2...v0.0.4)

---
updated-dependencies:
- dependency-name: io.spring.nullability
  dependency-version: 0.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
...

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

Author: dependabot[bot]

build.gradle

@@ -19,7 +19,7 @@ plugins {
 	id 'org.antora' version '1.0.0'
 	id 'io.spring.antora.generate-antora-yml' version '0.0.1'
 	id 'io.freefair.aggregate-javadoc' version '8.13.1'
-	id 'io.spring.nullability' version '0.0.2' apply false
+	id 'io.spring.nullability' version '0.0.4' apply false
 }
 
 description = 'Spring AMQP'