NackModule2: Rename to NackRequester.

The alternative new name proposed, NackTracker, is already in
use in audio_coding.

Fixed: webrtc:11594
Change-Id: I6a05fafc05fa7ddb18ea4f64886a135e5ef59f7e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/226744
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Markus Handell <handellm@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34539}
diff --git a/modules/video_coding/deprecated/BUILD.gn b/modules/video_coding/deprecated/BUILD.gn
index 487c026..a6fa790 100644
--- a/modules/video_coding/deprecated/BUILD.gn
+++ b/modules/video_coding/deprecated/BUILD.gn
@@ -15,7 +15,7 @@
   ]
 
   deps = [
-    "..:nack_module",
+    "..:nack_requester",
     "../..:module_api",
     "../../../api/units:time_delta",
     "../../../api/units:timestamp",