Update Sep 6, 2023 tracked by Updatify

go1.21.1 (released 2023-09-06)

go1.21.1 (released 2023-09-06) includes four security fixes to the cmd/go, crypto/tls, and html/template packages, as well as bug fixes to the compiler, the go command, the linker, the runtime, and the context, crypto/tls, encoding/gob, encoding/xml, go/types, net/http, os, and path/filepath packages. See the Go 1.21.1 milestone on our issue tracker for details.