Add @copilot bot mention to dictation skill instructions

[Copilot]

Speech-to-text systems need guidance to correctly dictate GitHub bot mentions like @copilot when assigning issues. Without explicit correction rules, "copilot" gets transcribed without the @ symbol required for GitHub mentions.

Changes

• skills/dictation/SKILL.md

  • Added @copilot to project glossary
  • Added speech-to-text corrections: "at copilot", "@ copilot", "copilot" → @copilot (context-dependent)
  • Renamed section to "AI Engines & Bots" for clarity

• .github/workflows/dictation-prompt.md

  • Added "Bot mentions: @copilot (for GitHub issue assignment)" to glossary focus areas
  • Ensures future regenerations include bot mention patterns

Example correction

### AI Engines & Bots
- "at copilot" → @copilot (when assigning/mentioning the bot)
- "@ copilot" → @copilot
- "copilot" → @copilot (when context indicates assignment or mention)

Original prompt

Update the dictation generation workflow and dictation instructions to fix references to bot names, specifically copilot

Add copilot -> @copilot

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