chg: Updated CHANGELOG.mg

CHANGELOG.md

@@ -18,6 +18,15 @@ Vulnerability-Lookup Changelog
 - **New NCSC-NL CSAF Importer**:
   ([#94](https://github.com/cve-search/vulnerability-lookup/issues/94))
 
+- **CISA Vulnrichment importer**:
+  The CISA Vulnrichment project is the public repository of CISA's enrichment
+  of public CVE records through CISA's ADP (Authorized Data Publisher) container.
+  In this phase of the project, CISA is assessing new and recent CVEs and adding
+  key SSVC decision points. Once scored, some higher-risk CVEs will also receive
+  enrichment of CWE and/or CVSS data points, where possible.
+  [More information](https://github.com/cisagov/vulnrichment).
+  ([#42](https://github.com/cve-search/vulnerability-lookup/issues/42))
+
 - **New Route**:
   `/api/vulnerability/cpesearch/<string:cpe>` to retrieve vulnerabilities by CPE (Common Platform Enumeration).
   ([41f8471](https://github.com/cve-search/vulnerability-lookup/commit/41f84710452861ddcb7388ecc3fa0d7b5bf44f5f))