Update model-access.md (#5196)

Hi.
This modification proposal deals with what is and what isn't a contract.
Regards.
IL.

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---------

Co-authored-by: Mirna Wong <[email protected]>
Co-authored-by: Matt Shaver <[email protected]>

website/docs/docs/collaborate/govern/model-access.md

@@ -124,7 +124,7 @@ For example, if you have a model config set as:
 
 </File>
 
-And the model contract is defined:
+And the model access is defined:
 
 <File name="models/my_project.yml">