Fix a typo in CpuSpeedTest::TestTuneScreen()

Change the second rc_2pass_vbr_minsection_pct to
rc_2pass_vbr_maxsection_pct.

This copy-and-paste error was introduced in
https://chromium-review.googlesource.com/c/webm/libvpx/+/332653.

Change-Id: I3469fa7d23562f0e2217c6be0d7e045f359f2022

test/cpu_speed_test.cc

diff --git a/test/cpu_speed_test.cc b/test/cpu_speed_test.cc
index b5f5d29..972d800 100644
--- a/test/cpu_speed_test.cc
+++ b/test/cpu_speed_test.cc
@@ -107,7 +107,7 @@
   ::libaom_test::Y4mVideoSource video("screendata.y4m", 0, 3);
   cfg_.g_timebase = video.timebase();
   cfg_.rc_2pass_vbr_minsection_pct = 5;
-  cfg_.rc_2pass_vbr_minsection_pct = 2000;
+  cfg_.rc_2pass_vbr_maxsection_pct = 2000;
   cfg_.rc_target_bitrate = 2000;
   cfg_.rc_max_quantizer = 63;
   cfg_.rc_min_quantizer = 0;