fix typo: require require

Author: ryenus

docs/manual/src/docs/asciidoc/_includes/about/exploits/csrf.adoc

@@ -103,7 +103,7 @@ Spring provides two mechanisms to protect against CSRF attacks:
 
 [NOTE]
 ====
-Both protections require require that <<Safe Methods Must be Idempotent>>
+Both protections require that <<Safe Methods Must be Idempotent>>
 ====
 
 [[csrf-protection-idempotent]]