Update mesh-api.yaml

Updated in response to Matt Mercer's review comments.

Author: tonyheap

specification/mesh-api.yaml

@@ -206,7 +206,7 @@ info:
 
     | Asset | Description |
     | MESH sandbox ([GitHub repo](https://github.com/NHSDigital/mesh-sandbox) \| [Python Package Index](https://pypi.org/project/mesh-sandbox/)) | For early developer testing, a realistic MESH experience that runs locally in docker or as an embedded python package. For more details, see 'Environments and testing' below. |
-    | MESH Python client ([GitHub repo](https://github.com/NHSDigital/mesh-client) \| [Python Package Index](https://pypi.org/project/Mesh-Client/)) | A sample client app written in Python. This is not the same as the MESH Java client. |
+    | MESH Python client ([GitHub repo](https://github.com/NHSDigital/mesh-client) \| [Python Package Index](https://pypi.org/project/Mesh-Client/)) | A fully-featured Python client library. This is not the same as the MESH Java client. |
     | MESH Validate Auth Header ([GitHub repo](https://github.com/NHSDigital/mesh_validate_auth_header) \| [GitHub pages UI](https://nhsdigital.github.io/mesh_validate_auth_header/#/)) | 
 
     ## Network access