Update release notes

- Remove HTTP/2 Fix note, since the issue is still present
- Add release note for fatal error handling fix

PiperOrigin-RevId: 269902736

RELEASENOTES.md

@@ -80,6 +80,8 @@
   * Support unwrapping of nested metadata (e.g. ID3 and SCTE-35 in EMSG).
 * Add `HttpDataSource.getResponseCode` to provide the status code associated
   with the most recent HTTP response.
+* Fix issue where a request would be retried after encountering an error, even
+  though the `LoadErrorHandlingPolicy` classified the error as fatal.
 * Fix initialization data handling for FLAC in MP4
   ([#6396](https://github.com/google/ExoPlayer/issues/6396),
   [#6397](https://github.com/google/ExoPlayer/issues/6397)).
@@ -87,8 +89,6 @@
   ([#6398](https://github.com/google/ExoPlayer/issues/6398)).
 * Fix `PlayerNotificationManager` to show play icon rather than pause icon when
   playback is ended ([#6324](https://github.com/google/ExoPlayer/issues/6324)).
-* OkHttp extension: Upgrade OkHttp to fix HTTP2 socket timeout issue
-  ([#4078](https://github.com/google/ExoPlayer/issues/4078)).
 * RTMP extension: Upgrade LibRtmp-Client-for-Android to fix RTMP playback issues
   ([#4200](https://github.com/google/ExoPlayer/issues/4200),
   [#4249](https://github.com/google/ExoPlayer/issues/4249),