Fix versioning bump, I think this would be a minor bump not a patch

docs/cellxgene_census_schema.md

@@ -1,8 +1,8 @@
 # CZ CELLxGENE Discover Census Schema
 
-**Version**: 2.1.0
+**Version**: 2.2.0
 
-**Last edited**: June, 2024.
+**Last edited**: December, 2024.
 
 The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED" "MAY", and "OPTIONAL" in this document are to be interpreted as described in [BCP 14](https://tools.ietf.org/html/bcp14), [RFC2119](https://www.rfc-editor.org/rfc/rfc2119.txt), and [RFC8174](https://www.rfc-editor.org/rfc/rfc8174.txt) when, and only when, they appear in all capitals, as shown here.
 
@@ -870,7 +870,7 @@ Cell metadata MUST be encoded as a `SOMADataFrame` with the following columns:
 
 ## Changelog
 
-### Version 2.1.1
+### Version 2.2.0
 
 * Allow cell culture and organoid data, e.g. values for `tissue_type` other than `tissue`.