Fix sentence case

Author: ogenstad

docs/docs/python-sdk/introduction.mdx

@@ -4,7 +4,7 @@ title: Python SDK
 
 The Infrahub Python SDK greatly simplifies how you can interact with Infrahub programmatically.
 
-## Blog Posts
+## Blog posts
 
 - [Querying Data in Infrahub via the Python SDK](https://www.opsmill.com/querying-data-in-infrahub-via-the-python-sdk/)