chore: fix docstring in models.py

PiperOrigin-RevId: 599898655

Author: jaycee-li

google/cloud/aiplatform/models.py

@@ -351,10 +351,10 @@ def create(
  Optional. Strings which should be sent along with the request as
  metadata.
  project (str):
- Required. Project to retrieve endpoint from. If not set, project
+ Optional. Project to retrieve endpoint from. If not set, project
  set in aiplatform.init will be used.
  location (str):
- Required. Location to retrieve endpoint from. If not set, location
+ Optional. Location to retrieve endpoint from. If not set, location
  set in aiplatform.init will be used.
  credentials (auth_credentials.Credentials):
  Optional. Custom credentials to use to upload this model. Overrides
@@ -472,11 +472,9 @@ def _create(
  The name can be up to 128 characters long and can be consist
  of any UTF-8 characters.
  project (str):
- Required. Project to retrieve endpoint from. If not set, project
- set in aiplatform.init will be used.
+ Required. Project to retrieve endpoint from.
  location (str):
- Required. Location to retrieve endpoint from. If not set, location
- set in aiplatform.init will be used.
+ Required. Location to retrieve endpoint from.
  description (str):
  Optional. The description of the Endpoint.
  labels (Dict[str, str]):