Fix Python integrations list on develop landing page (#5133)

* Fix Python integrations list on develop landing page

Point the Google ADK bullet at the local integration guide instead of
adk.dev. The external link predates the local guide added in #4759 and
was never updated.

Also add the missing Deep Agents bullet so the list matches the
Integrations entries in sidebars.js.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* Point Google ADK's Python entry in the integrations grid at the local guide

The IntegrationsGrid data still had the pre-#4759 external adk.dev
link for Python, same issue just fixed in the index.mdx list.

---------

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Co-authored-by: Duncan Mackenzie <duncanma@duncanmackenzie.net>
Co-authored-by: Duncan Mackenzie <duncan.mackenzie@temporal.io>

Author: 3 people

docs/develop/python/index.mdx

@@ -86,7 +86,8 @@ From there, you can dive deeper into any of the Temporal primitives to start bui
 ## [Integrations](/develop/python/integrations)
 
 - [Braintrust integration](/develop/python/integrations/braintrust)
-- [Google ADK integration](https://adk.dev/integrations/temporal/)
+- [Deep Agents integration](/develop/python/integrations/deepagents)
+- [Google ADK integration](/develop/python/integrations/google-adk)
 - [Google GenAI integration](/develop/python/integrations/google-genai)
 - [LangGraph integration](/develop/python/integrations/langgraph)
 - [LangSmith integration](/develop/python/integrations/langsmith)

src/components/IntegrationsGrid/integrations-data.json

@@ -69,7 +69,7 @@
       "Agent framework"
     ],
     "sdk": "Python",
-    "href": "https://adk.dev/integrations/temporal/"
+    "href": "/develop/python/integrations/google-adk"
   },
   {
     "name": "Google ADK",