Add the missing SpeechGrammarList.prototype.addFromURI method to w3c_speech.js, which is the correct function in the spec (https://w3c.github.io/speech-api/#speechgrammarlist).

PiperOrigin-RevId: 622895751

Author: Closure Team

externs/browser/w3c_speech.js

@@ -261,6 +261,11 @@ SpeechGrammarList.prototype.item = function(index) {};
  */
 SpeechGrammarList.prototype.addFromUri = function(src, weight) {};
 
+/**
+ * @type {function(string, number)}
+ */
+SpeechGrammarList.prototype.addFromURI = function(src, weight) {};
+
 /**
  * @type {function(string, number)}
  */