Update interfaces/xhr.idl (#27332)

Source: https://github.com/w3c/webref/blob/c7ad704/ed/idl/xhr.idl
Build: https://travis-ci.org/w3c/webref/builds/214557565
diff --git a/interfaces/xhr.idl b/interfaces/xhr.idl
index d6d8193..3abd09c 100644
--- a/interfaces/xhr.idl
+++ b/interfaces/xhr.idl
@@ -83,7 +83,7 @@
   iterable<USVString, FormDataEntryValue>;
 };
 
-[Exposed=(Window,DedicatedWorker,SharedWorker)]
+[Exposed=(Window,Worker)]
 interface ProgressEvent : Event {
   constructor(DOMString type, optional ProgressEventInit eventInitDict = {});