Build and publish only linux/amd64 and windows/amd64

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

deploy/build.sh

@@ -8,12 +8,13 @@
 #   dist/hammerhead_<version>_<os>_<arch>.tar.gz or .zip
 #   dist/SHA256SUMS
 #
-# Set TARGETS="linux/amd64 linux/arm64" to build fewer platforms.
+# Releases are published for linux/amd64 and windows/amd64 only. Set TARGETS="linux/arm64 darwin/arm64"
+# (any GOOS/GOARCH pair Go supports) to build something else by hand.
 set -eu
 NAME=hammerhead
 cd "$(dirname "$0")/.."
 VERSION=${1:-$(git describe --tags --always 2>/dev/null || echo dev)}
-TARGETS=${TARGETS:-"linux/amd64 linux/arm64 linux/arm windows/amd64 darwin/amd64 darwin/arm64"}
+TARGETS=${TARGETS:-"linux/amd64 windows/amd64"}
 
 rm -rf dist
 mkdir -p dist/bin dist/stage