Tune VideoCodecTestLibvpx.TemporalLayersVP8 thresholds.

After https://webrtc-review.googlesource.com/c/src/+/131141 there are some minor
changes to the encoding performance, hence the updated values.

Bug: none
Change-Id: I070a62ce725b0a79e5cb5c4679ab643de50c46c4
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/131334
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27466}
diff --git a/modules/video_coding/codecs/test/videocodec_test_libvpx.cc b/modules/video_coding/codecs/test/videocodec_test_libvpx.cc
index 71243e2..cb78f21 100644
--- a/modules/video_coding/codecs/test/videocodec_test_libvpx.cc
+++ b/modules/video_coding/codecs/test/videocodec_test_libvpx.cc
@@ -323,7 +323,7 @@
 
 #if defined(WEBRTC_ARCH_ARM) || defined(WEBRTC_ARCH_ARM64)
   std::vector<RateControlThresholds> rc_thresholds = {
-      {10, 1, 2, 1, 0.2, 0.1, 0, 1}, {12, 2, 3, 1, 0.2, 0.1, 0, 1}};
+      {10, 1, 2.1, 1, 0.2, 0.1, 0, 1}, {12, 2, 3, 1, 0.2, 0.1, 0, 1}};
 #else
   std::vector<RateControlThresholds> rc_thresholds = {
       {5, 1, 0, 1, 0.2, 0.1, 0, 1}, {10, 2, 0, 1, 0.2, 0.1, 0, 1}};