Fix issue link in release notes

PiperOrigin-RevId: 468670096
(cherry picked from commit c0cfb0b1)

RELEASENOTES.md

@@ -66,7 +66,7 @@
 *   Cast extension:
     *   Implement `getDeviceInfo()` to be able to identify `CastPlayer` when
         controlling playback with a `MediaController`
-        ([#142](https://github.com/google/ExoPlayer/issues/142)).
+        ([#142](https://github.com/androidx/media/issues/142)).
 
 ### 1.0.0-beta02 (2022-07-15)