[bot] Update Learning Hub for v1.0.69: plugin dashboard and dynamic skill retrieval

[github-actions]

Summary

This PR updates two Learning Hub pages with features from recent Copilot CLI releases (v1.0.66–v1.0.69, released July 1–7, 2026).

What new features or changes were found

Checking releases v1.0.68 (2026-07-01) and v1.0.69 (2026-07-07):

• /plugins dashboard (v1.0.69): New in-session management interface — browse installed plugins, enable/disable them, and reload extensions without restarting the session
• Dynamic retrieval for skills (v1.0.66): New --dynamic-retrieval skills=<on|off> flag and dynamicRetrieval persistent setting for embeddings-based automatic skill discovery

(Other recent additions — stayInAutopilot, auto allow-all mode, kimi-k2.7-code model, Claude Sonnet 5, /mcp list, subagent limits — were already documented in existing pages.)

What sections of the guide were updated

website/src/content/docs/learning-hub/installing-and-using-plugins.md

• Added "In-Session Plugin Dashboard (v1.0.69+)" subsection under "Managing Plugins"
  • Documents the /plugins slash command for opening the in-session plugin manager
  • Covers enabling/disabling plugins and reloading extensions without a session restart
• Updated lastUpdated to 2026-07-08

website/src/content/docs/learning-hub/creating-effective-skills.md

• Added "What is dynamic retrieval and how does it affect skills?" Q&A in the Common Questions section
  • Explains embeddings-based automatic skill discovery
  • Documents --dynamic-retrieval skills=on|off flag and dynamicRetrieval settings toggle
• Updated lastUpdated to 2026-07-08

Source announcements

• v1.0.69 release notes (2026-07-07): https://github.com/github/copilot-cli/releases/tag/v1.0.69
  • "Add a /plugins dashboard to manage installed plugins"
  • "Reload installed plugin extensions without restarting a session"
• v1.0.66 release notes (2026-06-30): https://github.com/github/copilot-cli/releases/tag/v1.0.66
  • "Add persisted dynamicRetrieval setting (and --dynamic-retrieval skills=(on|off) flag) to enable or disable embeddings-based retrieval of skills"

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