Fix description

Author: jvazquez-r7

modules/exploits/unix/webapp/get_simple_cms_upload_exec.rb

@@ -16,9 +16,9 @@ def initialize(info = {})
     super(update_info(info,
       'Name'           => 'GetSimpleCMS PHP File Upload Vulnerability',
       'Description'    => %q{
-        This module exploits a file upload vulnerability found in GetSimple CMS
-        By abusing the upload.php file, a malicious authenticated user can upload an arbitrary file to a upload
-        directory, which results in arbitrary code execution.
+        This module exploits a file upload vulnerability in GetSimple CMS. By abusing the
+        upload.php file, a malicious authenticated user can upload an arbitrary file,
+        including PHP code, which results in arbitrary code execution.
       },
       'Author'         =>
         [