update `orca` to `orca-mini`

README.md

@@ -105,7 +105,7 @@ For more examples, see the [examples](./examples) directory. For more informatio
 ### Pull a model from the registry
 
 ```
-ollama pull orca
+ollama pull orca-mini
 ```
 
 ### Listing local models

docs/api.md

@@ -14,7 +14,7 @@
 
 ### Model names
 
-Model names follow a `model:tag` format. Some examples are `orca:3b-q4_1` and `llama2:70b`. The tag is optional and if not provided will default to `latest`. The tag is used to identify a specific version.
+Model names follow a `model:tag` format. Some examples are `orca-mini:3b-q4_1` and `llama2:70b`. The tag is optional and if not provided will default to `latest`. The tag is used to identify a specific version.
 
 ### Durations