starter typo fix (#17984)

Author: logan-markewich

docs/docs/getting_started/starter_example.md

@@ -75,7 +75,7 @@ The `AgentWorkflow` is also able to remember previous messages. This is containe
 If the `Context` is passed in, the agent will use it to continue the conversation.
 
 ```python
-from llama_index.core.context import Context
+from llama_index.core.workflow import Context
 
 # create context
 ctx = Context(agent)

docs/docs/getting_started/starter_example_local.md

@@ -87,7 +87,7 @@ The `AgentWorkflow` is also able to remember previous messages. This is containe
 If the `Context` is passed in, the agent will use it to continue the conversation.
 
 ```python
-from llama_index.core.context import Context
+from llama_index.core.workflow import Context
 
 # create context
 ctx = Context(agent)