docs: rename standalone security file to english filename

Co-authored-by: cablate <85614048+cablate@users.noreply.github.com>

Author: Copilot

README.md

@@ -242,7 +242,7 @@ src/
 
 For enterprise security reviews, see the standalone document:
 
-- [Security Assessment Clarifications (23 items)](./SECURITY_ASSESSMENT_ZH.md)
+- [Security Assessment Clarifications (23 items)](./SECURITY_ASSESSMENT.md)
 
 ## License