docs: fix python API guide banner and featured images

Author: jyecusch

docs/guides/python/serverless-ai-api.mdx

@@ -1,13 +1,14 @@
 ---
 description: 'Build a Serverless AI-Powered Python API'
 tags:
+  - API
   - AI & Machine Learning
 languages:
   - python
 image: /docs/images/guides/serverless-ai-api/banner.png
 image_alt: 'Serverless AI-Powered API Banner'
 featured:
-  image: /docs/images/guides/serverless-ai-api/banner.png
+  image: /docs/images/guides/serverless-ai-api/featured.png
   image_alt: 'Serverless AI-Powered API Banner'
 published_at: 2025-05-09
 ---