[sheriff] Expect failure for...

[sheriff] Expect failure for virtual/cascade/fast/forms/month/month-appearance-basic.html on Mac10.10.

TBR=fdoray@chromium.org

Bug: 1090822
Change-Id: I85dacc2c73624f9e34985764cd99e6fbe660835c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2228119Reviewed-by: François Doray <fdoray@chromium.org>
Commit-Queue: François Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#774674}

third_party/blink/web_tests/TestExpectations

@@ -5903,3 +5903,4 @@ crbug.com/1011811 http/tests/devtools/persistence/automapping-sourcemap.js [ Pas
 
 # Sheriff 2020-06-03
 crbug.com/1088441 [ Mac ] http/tests/loading/bad-server-subframe.html [ Pass Failure ]
+crbug.com/1090822 [ Mac10.10 ] virtual/cascade/fast/forms/month/month-appearance-basic.html [ Pass Failure ]