rtp_sender: fix typo with spatial_bitmask

Bug: None
Change-Id: I07a8d3aa0bdb63eede8913466bad70a68636746f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/307302
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40217}
diff --git a/modules/rtp_rtcp/source/rtp_sender_video.cc b/modules/rtp_rtcp/source/rtp_sender_video.cc
index 4b1b375..af447e9 100644
--- a/modules/rtp_rtcp/source/rtp_sender_video.cc
+++ b/modules/rtp_rtcp/source/rtp_sender_video.cc
@@ -433,8 +433,8 @@
               video_header.generic->frame_id - dep);
         }
 
-        uint8_t spatial_bimask = 1 << video_header.generic->spatial_index;
-        generic_descriptor.SetSpatialLayersBitmask(spatial_bimask);
+        uint8_t spatial_bitmask = 1 << video_header.generic->spatial_index;
+        generic_descriptor.SetSpatialLayersBitmask(spatial_bitmask);
 
         generic_descriptor.SetTemporalLayer(
             video_header.generic->temporal_index);