Land rapid7#7512, fix check method in seagate expolit

Author: pbarry-r7

modules/exploits/linux/http/seagate_nas_php_exec_noauth.rb

@@ -87,7 +87,7 @@ def check
         headers = res.to_s
 
         # validate headers
-        if headers.incude?('X-Powered-By: PHP/5.2.13') && headers.include?('Server: lighttpd/1.4.28')
+        if headers.include?('X-Powered-By: PHP/5.2.13') && headers.include?('Server: lighttpd/1.4.28')
           # and make sure that the body contains the title we'd expect
           if res.body.include?('Login to BlackArmor')
             return Exploit::CheckCode::Appears