Removes security.txt from docs (broken link)

web/docusaurus.config.js

@@ -159,11 +159,7 @@ module.exports = {
             {
               label: 'Lawyers.txt',
               to: 'https://supabase.io/lawyers.txt',
-            },
-            {
-              label: 'Security.txt',
-              to: ' https://supabase.io/.well-known/security.txt',
-            },
+            }
           ],
         },
         {