Subsonic: Fixed casing of "bitRate" attribute

This follows the Subsonic / OpenSubsonic API spec

Part-of: <https://dev.funkwhale.audio/funkwhale/funkwhale/-/merge_requests/2695>

api/funkwhale_api/subsonic/serializers.py

@@ -131,7 +131,7 @@ def get_track_data(album, track, upload):
     if album and album.attachment_cover_id:
         data["coverArt"] = f"al-{album.id}"
     if upload.bitrate:
-        data["bitrate"] = int(upload.bitrate / 1000)
+        data["bitRate"] = int(upload.bitrate / 1000)
     if upload.size:
         data["size"] = upload.size
     if album and album.release_date:
@@ -347,7 +347,7 @@ def get_channel_episode_data(upload, channel_id):
         "genre": "Podcast",
         "size": upload.size if upload.size else "",
         "duration": upload.duration if upload.duration else "",
-        "bitrate": upload.bitrate / 1000 if upload.bitrate else "",
+        "bitRate": upload.bitrate / 1000 if upload.bitrate else "",
         "contentType": upload.mimetype or "audio/mpeg",
         "suffix": upload.extension or "mp3",
         "status": "completed",

api/tests/subsonic/test_serializers.py

@@ -202,7 +202,7 @@ def test_get_album_serializer(factories):
                 "contentType": upload.mimetype,
                 "suffix": upload.extension or "",
                 "path": serializers.get_track_path(track, upload.extension),
-                "bitrate": 42,
+                "bitRate": 42,
                 "duration": 43,
                 "size": 44,
                 "created": serializers.to_subsonic_date(track.creation_date),
@@ -344,7 +344,7 @@ def test_channel_episode_serializer(factories):
         "genre": "Podcast",
         "size": upload.size,
         "duration": upload.duration,
-        "bitrate": upload.bitrate / 1000,
+        "bitRate": upload.bitrate / 1000,
         "contentType": upload.mimetype,
         "suffix": upload.extension,
         "status": "completed",