docs: update using llama stack as library docs (llamastack#2931)

# What does this PR do?
<!-- Provide a short summary of what this PR does and why. Link to
relevant issues if applicable. -->
Updates provider template from outdated `ollama` to `starter` 
<!-- If resolving an issue, uncomment and update the line below -->
<!-- Closes #[issue-number] -->
Closes: llamastack#2839 
## Test Plan
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summaries. *Provide clear instructions so the plan can be easily
re-executed.* -->

Author: Bobbins228

docs/source/distributions/importing_as_library.md

@@ -13,7 +13,7 @@ llama stack build --template starter --image-type venv
 from llama_stack.distribution.library_client import LlamaStackAsLibraryClient
 
 client = LlamaStackAsLibraryClient(
-    "ollama",
+    "starter",
     # provider_data is optional, but if you need to pass in any provider specific data, you can do so here.
     provider_data={"tavily_search_api_key": os.environ["TAVILY_SEARCH_API_KEY"]},
 )