Use same order between LoadOp and StoreOp

Just a minor consistency thing.
This order is the same order it's written in the upstream JS spec
(though JS doesn't actually care about the order) as well as in Vulkan.

Upstream PR: https://github.com/webgpu-native/webgpu-headers/pull/323
Upstream bug: https://github.com/webgpu-native/webgpu-headers/issues/65

Bug: none
Change-Id: Id70d99568c360225516acd347564d1b6de449d0c
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/204734
Auto-Submit: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
diff --git a/src/dawn/dawn.json b/src/dawn/dawn.json
index c2a2d34..16d7a31 100644
--- a/src/dawn/dawn.json
+++ b/src/dawn/dawn.json
@@ -2926,8 +2926,8 @@
         "category": "enum",
         "values": [
             {"value": 0, "name": "undefined", "jsrepr": "undefined"},
-            {"value": 1, "name": "clear"},
-            {"value": 2, "name": "load"},
+            {"value": 1, "name": "load"},
+            {"value": 2, "name": "clear"},
             {"value": 3, "name": "expand resolve texture", "tags": ["dawn"]}
         ]
     },