small tweak to in-question keyboard instructions based on feedback

src/player.html

@@ -177,7 +177,7 @@ <h1>{{ title }}</h1>
 					role="text"
 					ng-attr-inert="{{ lightboxTarget != -1 || instructionsOpen == true ? 'true' : undefined}}"
 					ng-click="toggleQuestionInstructions()"
-					aria-label="Question: {{ currentQuestion.questions[0].text }}. Use the Tab key to navigate {{ currentQuestion.options.asset ? 'to the associated media, then' : '' }} through answer options, and then to reach the Return and Submit Final Answer buttons. The Up and Down arrow keys may also be used to navigate through answer options. Press the Enter or Space key on an answer option to select it. Pressing the Escape key will leave this question and allow you to select another question. Press the Q key to hear the question again. Press the S key after selecting an answer to be taken to the Submit Final Answer button automatically. Press the H key to hear these instructions again.">
+					aria-label="Question: {{ currentQuestion.questions[0].text }}. Keyboard instructions: use the Tab key to navigate {{ currentQuestion.options.asset ? 'to the associated media, then' : '' }} through answer options, and then to reach the Return and Submit Final Answer buttons. The Up and Down arrow keys may also be used to navigate through answer options. Press the Enter or Space key on an answer option to select it. Pressing the Escape key will leave this question and allow you to select another question. Press the Q key to hear the question again. Press the S key after selecting an answer to be taken to the Submit Final Answer button automatically. Press the H key to hear these instructions again.">
 					Show Keyboard Instructions
 				</span>
 				<h1>