Add enrichment contribute.md

Signed-off-by: DR <[email protected]>

SBOM-Catalog/contribute.md

@@ -58,6 +58,7 @@ Abilities describe the capabilities of the tool. In what part of the software de
 - **Merge**     - *Can merge several SBOMs*
 - **Validate**  - *Can validate a SBOM against the file schema or requirements like defined by the NTIA*
 - **Sign**      - *Can sign a SBOM (according to the signage process of the schema)*
+- **Enrich**    - *Can enrich the components listed in the SBOM with data from various sources like vulnerabilities, OSS licenses, provenance*
 
 ##### Type
 SBOMs may contain different forms of the minimum information sourced from different