Update old TODO comments

Bug: None
Change-Id: I96850df6cfa19303043108a59ef60d7b686ec747
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/267661
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37436}

api/video_codecs/video_encoder_config.h

@@ -141,7 +141,7 @@ class VideoEncoderConfig {
   ~VideoEncoderConfig();
   std::string ToString() const;
 
-  // TODO(nisse): Consolidate on one of these.
+  // TODO(bugs.webrtc.org/6883): Consolidate on one of these.
   VideoCodecType codec_type;
   SdpVideoFormat video_format;