Update opt guide prediction key to final prod key

Bug: 1146151
Change-Id: I551d3ca08377836d6354fc6034b7938f6ac9408c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2643222
Commit-Queue: Sophie Chang <sophiechang@chromium.org>
Auto-Submit: Sophie Chang <sophiechang@chromium.org>
Reviewed-by: Michael Crouse <mcrouse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845918}

chrome/browser/optimization_guide/prediction/prediction_model_download_manager.cc

@@ -36,10 +36,9 @@ constexpr char kGoogApiKey[] = "X-Goog-Api-Key";
 // The SHA256 hash of the public key for the Optimization Guide Server that
 // we require models to come from.
 constexpr uint8_t kPublisherKeyHash[] = {
-    0x0f, 0x01, 0x7c, 0x8e, 0x09, 0xaf, 0x7d, 0x61, 0x54, 0xcb, 0xde,
-    0x9c, 0x80, 0x59, 0xcf, 0x49, 0x3d, 0x08, 0xdf, 0x60, 0x3d, 0x7d,
-    0x4d, 0xd7, 0x8a, 0xa6, 0xfb, 0x63, 0x43, 0x28, 0xbd, 0x0b};
-
+    0x66, 0xa1, 0xd9, 0x3e, 0x4e, 0x5a, 0x66, 0x8a, 0x0f, 0xd3, 0xfa,
+    0xa3, 0x70, 0x71, 0x42, 0x16, 0x0d, 0x2d, 0x68, 0xb0, 0x53, 0x02,
+    0x5c, 0x7f, 0xd0, 0x0c, 0xa1, 0x6e, 0xef, 0xdd, 0x63, 0x7a};
 const net::NetworkTrafficAnnotationTag
     kOptimizationGuidePredictionModelsTrafficAnnotation =
         net::DefineNetworkTrafficAnnotation("optimization_guide_model_download",