Merge pull request #307 from kagent-dev/adb-adk-version

[docs] bump adk version

Author: artberger

src/app/docs/kagent/examples/a2a-byo/page.mdx

@@ -18,7 +18,8 @@ Unlike declarative agents that are defined by kagent resources with components s
 
 ## Prerequisites
 
-Install kagent by following the [quick start](/docs/kagent/getting-started/quickstart) guide.
+1. Install kagent by following the [quick start](/docs/kagent/getting-started/quickstart) guide.
+2. Use [Google ADK](https://github.com/google/adk-python) version 1.22.1 or later.
 
 ## Building a custom agent