release: Update to the latest Go version

[bep]

For the release build + Docker file.

Current versions are:

• Release binaries: Go 1.23.0
• Docker: Go 1.22.6

Latest Go version is Go 1.23.2, see https://go.dev/doc/devel/release#go1.23.0. There have been some security fixes. I don't see how these could be exploited in Hugo, but I understand that many would want a clean security report.

go1.23.1 (released 2024-09-05) includes security fixes to the encoding/gob, go/build/constraint, and go/parser packages, as well as bug fixes to the compiler, the go command, the runtime, and the database/sql, go/types, os, runtime/trace, and unique packages. See the [Go 1.23.1 milestone](https://github.com/golang/go/issues?q=milestone%3AGo1.23.1+label%3ACherryPickApproved) on our issue tracker for details.

go1.23.2 (released 2024-10-01) includes fixes to the compiler, cgo, the runtime, and the maps, os, os/exec, time, and unique packages. See the [Go 1.23.2 milestone](https://github.com/golang/go/issues?q=milestone%3AGo1.23.2+label%3ACherryPickApproved) on our issue tracker for details.

[github-actions]

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