Fix missing <type>pom</type> for groovy-all dependency

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Fix missing <type>pom</type> for groovy-all dependency

Context:
The build-info-extractor-maven3 package declares a dependency on org.codehaus.groovy:groovy-all:3.0.13. Starting from version 3.0.0, the groovy-all package discontinued publishing the actual .jar artifact and was refactored into a pom packaging type (aggregator).

Bug:
Because the dependency definition in build.gradle omits the artifact extension, the generated pom.xml defaults to a jar type. This causes downstream users in strict or offline environments (e.g., using dependency:copy-dependencies) to suffer fatal --fail-at-end build crashes:
Could not resolve dependencies [...] org.codehaus.groovy:groovy-all:jar:3.0.13 was not found

Fix:
This PR simply appends @pom to the dependency declaration in build.gradle so that the maven-publish plugin accurately generates the required <type>pom</type> in the resulting POM file, effectively resolving the dependency tree resolution failure.

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