dashboard: fix typo in host-darwin-arm64-12 description

The current releaselet descriptions are good, as recently discussed,
leaving just one typo in the macOS version name to fix up to reduce
confusion.

Change-Id: I60d12dcc67c2bfa4842b081b0c0e950faa50a067
Reviewed-on: https://go-review.googlesource.com/c/build/+/452856
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
diff --git a/dashboard/builders.go b/dashboard/builders.go
index 74a4455..bcaa3df 100644
--- a/dashboard/builders.go
+++ b/dashboard/builders.go
@@ -219,7 +219,7 @@
 	"host-darwin-arm64-12": {
 		IsReverse:     true,
 		ExpectNum:     3,
-		Notes:         "macOS Big Sur (12) ARM64 (M1) on Mac minis in a Google office",
+		Notes:         "macOS Monterey (12) ARM64 (M1) on Mac minis in a Google office",
 		SSHUsername:   "gopher",
 		GoogleReverse: true,
 	},
diff --git a/internal/releasetargets/releases.txt b/internal/releasetargets/releases.txt
index 0edd2e2..9415185 100644
--- a/internal/releasetargets/releases.txt
+++ b/internal/releasetargets/releases.txt
@@ -7,7 +7,7 @@
 
 darwin-arm64    darwin     arm64      darwin-arm64-12
 	Race enabled
-	Running on reverse builder: macOS Big Sur (12) ARM64 (M1) on Mac minis in a Google office
+	Running on reverse builder: macOS Monterey (12) ARM64 (M1) on Mac minis in a Google office
 
 freebsd-386     freebsd    386        freebsd-386-12_3
 	Running on GCP
@@ -59,7 +59,7 @@
 
 darwin-arm64    darwin     arm64      darwin-arm64-12
 	Race enabled
-	Running on reverse builder: macOS Big Sur (12) ARM64 (M1) on Mac minis in a Google office
+	Running on reverse builder: macOS Monterey (12) ARM64 (M1) on Mac minis in a Google office
 
 freebsd-386     freebsd    386        freebsd-386-12_3
 	Running on GCP
@@ -109,7 +109,7 @@
 	Running on reverse builder: MacStadium macOS Monterey (12) VM under VMWare ESXi
 
 darwin-arm64    darwin     arm64      darwin-arm64-12
-	Running on reverse builder: macOS Big Sur (12) ARM64 (M1) on Mac minis in a Google office
+	Running on reverse builder: macOS Monterey (12) ARM64 (M1) on Mac minis in a Google office
 
 freebsd-386     freebsd    386        freebsd-386-12_3
 	Running on GCP