docs(governance): use j.d.a.jewell@open.ac.uk as canonical contact email

https://claude.ai/code/session_017TXizM5c1Yd9HWf7Y15YH2

Author: claude

.github/CODE_OF_CONDUCT.md

@@ -120,7 +120,7 @@ If you experience or witness unacceptable behaviour, or have any other concerns,
 
 | Method | Details | Best For |
 |--------|---------|----------|
-| **Email** | 6759885+hyperpolymath@users.noreply.github.com | Detailed reports, sensitive matters |
+| **Email** | j.d.a.jewell@open.ac.uk | Detailed reports, sensitive matters |
 | **Private Message** | Contact any maintainer directly | Quick questions, minor issues |
 | **Anonymous Form** | [Link to form if available] | When you need anonymity |
 
@@ -215,7 +215,7 @@ For contributors with elevated access (Perimeter 2 or 1):
 If you believe an enforcement decision was made in error:
 
 1. **Wait 7 days** after the decision (cooling-off period)
-2. **Email** 6759885+hyperpolymath@users.noreply.github.com with subject line "Appeal: [Original Report ID]"
+2. **Email** j.d.a.jewell@open.ac.uk with subject line "Appeal: [Original Report ID]"
 3. **Explain** why you believe the decision should be reconsidered
 4. **Provide** any new information not previously available
 
@@ -295,7 +295,7 @@ We thank these communities for their leadership in creating welcoming spaces.
 If you have questions about this Code of Conduct:
 
 - Open a [Discussion](https://github.com/hyperpolymath/nextgen-typing/discussions) (for general questions)
-- Email 6759885+hyperpolymath@users.noreply.github.com (for private questions)
+- Email j.d.a.jewell@open.ac.uk (for private questions)
 - Contact any maintainer directly
 
 ---