Small refactoring for Runbook Templates

[c02mo]

Description

Refactor runbook manifest to update agent names and descriptions

• Changed "Worker Runbook" to "Worker Agent" with a new description emphasizing task processing.
• Updated "Conversational Runbook" to "Conversational Agent" with a description highlighting team collaboration.
• Adjusted the key from "agent-type" to "type" for both agents to align with naming conventions.

How can (was) this tested?

Manual

Screenshots (if needed)

Checklist:

• I have bumped the version number for the Action Package / Agent
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation - README.md file
• I have updated the CHANGELOG.md file in correspondence with my changes
• I have added tests that prove my fix is effective or that my feature works
• OAuth2: I have made sure that action has necessary scopes (works in whitelisted mode)