Source Control URL on maven central invalid for submodules (spoon-core and spoon-javadoc)

The url listed for Source Control under External Resources is broken for submodules.

It is correct and working for spoon-pom:
[spoon-pom](https://central.sonatype.com/artifact/fr.inria.gforge.spoon/spoon-pom) has Source Control URL: https://github.com/INRIA/spoon

But for submodules the urls are github 404 links:
[spoon-core](https://central.sonatype.com/artifact/fr.inria.gforge.spoon/spoon-core) has Source Control URL: https://github.com/INRIA/spoon/spoon-core
[spoon-javadoc](https://central.sonatype.com/artifact/fr.inria.gforge.spoon/spoon-javadoc) has Source Control URL: https://github.com/INRIA/spoon-javadoc

Start by inspecting the project metadata and publication configuration that produces the Maven Central entries for spoon-pom, spoon-core, and spoon-javadoc. Compare their generated Source Control URLs with the repository links in the issue, then verify that each artifact points to a valid GitHub location after the metadata is regenerated.

Written by the indexing model from the issue text.