Build binaries for darwin/arm64 (#433)

Adds a binary build for macOS on ARM arch, ie: M1 processors.

.github/workflows/release.yml

@@ -19,6 +19,7 @@ jobs:
           CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=6 go build -o "mkcert-$(git describe --tags)-linux-arm" -ldflags "-X main.Version=$(git describe --tags)"
           CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o "mkcert-$(git describe --tags)-linux-arm64" -ldflags "-X main.Version=$(git describe --tags)"
           CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 go build -o "mkcert-$(git describe --tags)-darwin-amd64" -ldflags "-X main.Version=$(git describe --tags)"
+          CGO_ENABLED=0 GOOS=darwin GOARCH=arm64 go build -o "mkcert-$(git describe --tags)-darwin-arm64" -ldflags "-X main.Version=$(git describe --tags)"
           CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build -o "mkcert-$(git describe --tags)-windows-amd64.exe" -ldflags "-X main.Version=$(git describe --tags)"
       - name: Upload release artifacts
         uses: actions/github-script@v3