Fix AudioListener typo in browser protocol PDL

Change-Id: I52239ca5c653e34c178a41bdb2d61c70c9183c22
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2401043
Commit-Queue: Jack Franklin <jacktfranklin@chromium.org>
Commit-Queue: Andrey Kosyakov <caseq@chromium.org>
Auto-Submit: Jack Franklin <jacktfranklin@chromium.org>
Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
Cr-Commit-Position: refs/heads/master@{#805354}

third_party/blink/public/devtools_protocol/browser_protocol.pdl

@@ -7970,7 +7970,7 @@ experimental domain WebAudio
       # Context sample rate.
       number sampleRate
 
-# Protocol object for AudioListner
+# Protocol object for AudioListener
   type AudioListener extends object
     properties
       GraphObjectId listenerId