Update no-unknown-property.js

They body tag supports an onload event

https://www.w3schools.com/jsref/event_onload.asp

Author: DerekStapleton

lib/rules/no-unknown-property.js

@@ -85,7 +85,7 @@ const ATTRIBUTE_TAGS_MAP = {
   onEncrypted: ['audio', 'video'],
   onEnded: ['audio', 'video'],
   onError: ['audio', 'video', 'img', 'link', 'source', 'script', 'picture', 'iframe'],
-  onLoad: ['script', 'img', 'link', 'picture', 'iframe', 'object', 'source'],
+  onLoad: ['script', 'img', 'link', 'picture', 'iframe', 'object', 'source', 'body'],
   onLoadedData: ['audio', 'video'],
   onLoadedMetadata: ['audio', 'video'],
   onLoadStart: ['audio', 'video'],