Update dependencies

[fabian-barney]

Summary

• Updates Maven wrapper to 3.9.16.
• Updates internal quality plugins to crap-java 0.6.1 and cognitive-java 0.6.0.

Version decisions

• Preserves Java 21 compatibility.
• Uses Maven 3.9.16 as the latest compatible Maven 3.x release; Maven 4 remains RC-only and was skipped.

Validation

• ./mvnw.cmd -B verify
• ./mvnw.cmd -B -Pnullaway verify

Closes #65

[Copilot]

Pull request overview

This PR updates build tooling dependencies for the utils-java Maven project, aligning the Maven Wrapper distribution and the internal quality gate plugins with the versions requested in #65.

Changes:

• Bumped internal quality gate plugin versions (crap-java to 0.6.1, cognitive-java to 0.6.0) via pom.xml properties.
• Updated Maven Wrapper distribution from Maven 3.9.15 to 3.9.16 in .mvn/wrapper/maven-wrapper.properties.
• Updated wrapper scripts (mvnw, mvnw.cmd) to Maven Wrapper 3.3.4 script defaults/URLs.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
pom.xml	Updates properties for internal quality-gate Maven plugins.
mvnw.cmd	Updates wrapper script metadata/URLs to Maven Wrapper 3.3.4 defaults.
mvnw	Updates wrapper script metadata/URLs and SHA check invocation for wrapper jar verification logic.
.mvn/wrapper/maven-wrapper.properties	Sets Maven distribution to 3.9.16 and records wrapper version/URLs (3.3.4).