javascript: Update property access for `document.defaultView as getAPropertyRead

Changed the method for accessing `defaultView` from `getAPropertyReference` to `getAPropertyRead` to improve accuracy in data flow analysis for global variable references.

Author: Eliav2

javascript/ql/lib/semmle/javascript/dataflow/Nodes.qll

@@ -384,7 +384,7 @@ DataFlow::SourceNode globalObjectRef() {
   result = globalVariable("window")
   or
   // DOM alias via `document.defaultView`
-  result = globalVariable("document").getAPropertyReference("defaultView")
+  result = globalVariable("document").getAPropertyRead("defaultView")
   or
   // Node.js
   result = globalVariable("global")