Add Amendments to Project Governance section

Author: kabilar

docs/terms-policies/governance.md

@@ -94,3 +94,14 @@ Path to role:
     - Approve major architectural shifts
     - Oversee risk, sustainability, funding alignment
 
+## 12. Amendments to Project Governance
+
+Process
+1. Proposal pull request
+2. Minimum of a 30 day public comment
+3. Approval by Project Leadership
+4. Update version and effective data in Governance document header
+
+- Urgent amendments may use an accelerated 7 day window with rationale documented.
+- The document becomes active upon Project Leadership approval and publication in the [DANDI Docs](https://docs.dandiarchive.org/).
+