Updates from testing

[David Yack (davidyack)]

This pull request updates lab instructions and documentation for building agents in Microsoft Copilot Studio, focusing on improving clarity, accuracy, and alignment with the latest UI and terminology. The changes primarily refine step-by-step instructions, update screenshots and image captions, and clarify agent creation and configuration steps across multiple labs.

Key changes include:

Instructional and Terminology Updates:

• Replaced outdated terms like "Create agent" and "Agents" with "New agent" and updated descriptions to match the current Copilot Studio UI and workflow. This improves clarity for users following the labs.

Screenshot and Image Caption Enhancements:

• Updated image captions and alt text to provide more descriptive and accessible explanations of screenshots, reflecting the current UI and making the labs easier to follow.

Agent Configuration and Knowledge Integration:

• Improved and clarified instructions for configuring agent knowledge sources, including SharePoint and ServiceNow integration, and updated steps for adding files, using formulas, and setting up capabilities.

Testing, Preview, and Error Handling:

• Updated references to panes and testing workflows (e.g., "test pane" to "Preview pane") and clarified error handling tips for agent testing and configuration.

General Content and Language Improvements:

• Improved overall language for conciseness, consistency, and professionalism, including lab introductions and step instructions.

These updates ensure that the lab documentation is accurate, user-friendly, and aligned with the latest Copilot Studio experience.