Fix error in OSHP redirection

Author: righettod

Diff for: redirects/list_of_useful_http_headers.md

@@ -4,7 +4,7 @@ title: List of useful HTTP headers
 permalink: /List_of_useful_HTTP_headers
 redirect_from:
   - /index.php/List_of_useful_HTTP_headers
-  - List-of-useful-HTTP-headers
+  - /List-of-useful-HTTP-headers
 redirect_to: /www-project-secure-headers/
 
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