guide uses uv rather than pipenv, updating text. (#727)

Author: raksiv

docs/guides/python/serverless-rest-api-example.mdx

@@ -36,7 +36,7 @@ updated_at: 2025-01-06
 
 ## Prerequisites
 
-- [Pipenv](https://pypi.org/project/pipenv/) - for simplified dependency management
+- [uv](https://docs.astral.sh/uv/#getting-started) - for simplified dependency management
 - The [Nitric CLI](/get-started/installation)
 - _(optional)_ Your choice of an [AWS](https://aws.amazon.com), [GCP](https://cloud.google.com) or [Azure](https://azure.microsoft.com) account