fix value inconsistency in LimitXMLRequestBody example

value of 1 MiB = 1048576

Submitted by: Chenjp <[email protected]>

Github: closes #506


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1922928 13f79535-47bb-0310-9956-ffa450edef68

Author: covener

docs/manual/mod/core.xml

@@ -3077,7 +3077,7 @@ LimitRequestLine 4094
 
     <highlight language="config">
 # Limit of 1 MiB
-LimitXMLRequestBody 1073741824
+LimitXMLRequestBody 1048576
     </highlight>
 
 </usage>