Add kRG_88_SkColorType

Bug: skia:9121

Change-Id: Id2a12a5d607b84ce393d2b58233bf8e23f646059
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/235797
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Mike Reed <reed@google.com>
diff --git a/modules/canvaskit/canvaskit_bindings.cpp b/modules/canvaskit/canvaskit_bindings.cpp
index 4705200..f610fc6 100644
--- a/modules/canvaskit/canvaskit_bindings.cpp
+++ b/modules/canvaskit/canvaskit_bindings.cpp
@@ -1234,7 +1234,8 @@
         .value("RGB_101010x", SkColorType::kRGB_101010x_SkColorType)
         .value("Gray_8", SkColorType::kGray_8_SkColorType)
         .value("RGBA_F16", SkColorType::kRGBA_F16_SkColorType)
-        .value("RGBA_F32", SkColorType::kRGBA_F32_SkColorType);
+        .value("RGBA_F32", SkColorType::kRGBA_F32_SkColorType)
+        .value("RG_88", SkColorType::kRG_88_SkColorType);
 
     enum_<SkPath::FillType>("FillType")
         .value("Winding",           SkPath::FillType::kWinding_FillType)