Go 1.20.2

> go1.20.2 (released 2023-03-07) includes a security fix to the crypto/elliptic package,
> as well as bug fixes to the compiler, the covdata command, the linker, the runtime, and
> the crypto/ecdh, crypto/rsa, crypto/x509, os, and syscall packages.
> See the Go 1.20.2 milestone on our issue tracker for details.

https://go.dev/doc/devel/release#go1.20.minor

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

Vagrantfile

@@ -101,7 +101,7 @@ EOF
   config.vm.provision "install-golang", type: "shell", run: "once" do |sh|
     sh.upload_path = "/tmp/vagrant-install-golang"
     sh.env = {
-        'GO_VERSION': ENV['GO_VERSION'] || "1.20.1",
+        'GO_VERSION': ENV['GO_VERSION'] || "1.20.2",
     }
     sh.inline = <<~SHELL
         #!/usr/bin/env bash