dashboard: update darwin{,-amd64} slowbot alias to macOS 13 builder

We don't yet have a macOS 13 darwin/arm64 builder, but the amd64 one
does exist and should be a better default slowbot choice by now.

Change-Id: I41156a37e0903629fc4c2ed3bfb57a7965670c96
Reviewed-on: https://go-review.googlesource.com/c/build/+/463576
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
diff --git a/cmd/coordinator/coordinator_test.go b/cmd/coordinator/coordinator_test.go
index edb439d..038ac42 100644
--- a/cmd/coordinator/coordinator_test.go
+++ b/cmd/coordinator/coordinator_test.go
@@ -344,7 +344,7 @@
 	for _, bc := range slowBots {
 		got = append(got, bc.Name)
 	}
-	want := []string{"aix-ppc64", "darwin-amd64-12_0", "linux-arm64"}
+	want := []string{"aix-ppc64", "darwin-amd64-13", "linux-arm64"}
 	if !reflect.DeepEqual(got, want) {
 		t.Errorf("mismatch:\n got: %q\nwant: %q\n", got, want)
 	}
diff --git a/dashboard/builders.go b/dashboard/builders.go
index a56babb..8dd6d13 100644
--- a/dashboard/builders.go
+++ b/dashboard/builders.go
@@ -38,8 +38,8 @@
 	"android-arm64":         "android-arm64-corellium",
 	"arm":                   "linux-arm-aws",
 	"arm64":                 "linux-arm64",
-	"darwin":                "darwin-amd64-12_0",
-	"darwin-amd64":          "darwin-amd64-12_0",
+	"darwin":                "darwin-amd64-13",
+	"darwin-amd64":          "darwin-amd64-13",
 	"darwin-arm64":          "darwin-arm64-12",
 	"ios-arm64":             "ios-arm64-corellium",
 	"dragonfly":             "dragonfly-amd64-622",