gpu_display: fix Linux keycode for '`'.

BUG=b:213150276
TEST=presubmit

Change-Id: I92fad55467b1f740ec94cf1575573d47141b7c76
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3871958
Commit-Queue: Pujun Lun <lunpujun@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Tested-by: Pujun Lun <lunpujun@google.com>
diff --git a/gpu_display/src/keycode_converter/data.rs b/gpu_display/src/keycode_converter/data.rs
index a54cf0e..01d9b7d 100644
--- a/gpu_display/src/keycode_converter/data.rs
+++ b/gpu_display/src/keycode_converter/data.rs
@@ -297,7 +297,7 @@
         mac: 0x0027,
     },
     MapEntry {
-        linux_keycode: 399,
+        linux_keycode: 41,
         xkb: 0x0031,
         win: 0x0029,
         mac: 0x0032,