Clarify that pre-built agents are optional helpers

Updated the Two Specialized Agents callout to emphasize:
- These are ready-to-use agents to help users get started fast
- Pre-configured with optimized prompts, rules, and Atlassian MCP
- Users don't have to use them, but they provide the best experience
- Users can create their own custom agents instead

Generated with [Continue](https://continue.dev)

Co-Authored-By: Continue <[email protected]>

Author: BekahHW

docs/guides/atlassian-mcp-continue-cookbook.mdx

@@ -48,7 +48,7 @@ For all options, first:
 ## Choose Your Atlassian Agent
 
 <Card title="🚀 Two Specialized Agents" icon="rocket">
-  Continue provides dedicated agents for Jira and Confluence workflows. Choose the agent that matches your needs.
+  We've created two ready-to-use agents to help you get started fast - they come pre-configured with optimized prompts, rules, and the Atlassian MCP. You don't have to use these agents, but they're designed to give you the best experience right away. Choose the agent that matches your needs, or create your own custom agent.
 </Card>
 
 ### Agent Quick Reference