eli-389 spelling and markdown formatting

Author: eddalmond1

docs/security-headers.md

@@ -30,6 +30,7 @@ File: `infrastructure/stacks/api-layer/gateway_responses.tf`
 Gateway responses handle error responses generated by API Gateway itself (e.g., validation failures, authorization errors, throttling).
 
 The following response types have been configured:
+
 - `DEFAULT_4XX` - All 4xx errors
 - `DEFAULT_5XX` - All 5xx errors
 - `UNAUTHORIZED` (401)
@@ -39,6 +40,7 @@ The following response types have been configured:
 ### 2. Flask Middleware
 
 Files:
+
 - `src/eligibility_signposting_api/middleware/security_headers.py` - Middleware implementation
 - `src/eligibility_signposting_api/middleware/__init__.py` - Package exports
 - `src/eligibility_signposting_api/app.py` - Middleware registration

scripts/config/vale/styles/config/vocabularies/words/accept.txt

@@ -8,6 +8,8 @@ Gitleaks
 Grype
 idempotence
 Makefile
+Middleware
+middleware
 OAuth
 Octokit
 onboarding