Export deployment data to calling workflow (#270)

This adds two outputs to both the `deploy-release-reusable` and `deploy-snapshot-reusable` workflows:

- `project-version`: contains the version of the deployed project.
- `nexus-url`: contains the URL of the Nexus repository, where the artifacts were deployed.

[It also fixes a small YAML syntax error, ignored by GitHub, but reported by IDEA]
3 files changed