go.mod: update minimum Go version to 1.23.0

OVERVIEW

The Go project now unconditionally updates the minimum Go version for
golang.org/x/ dependencies to be at least 1.(N-1).0, where Go 1.N is
the most recent major Go release, and Go 1.(N-1) is the previous major
Go release.

Since this project uses dependencies associated with golang.org/x
repositories this project's go.mod file is also updated to reflect
the new minimum Go version.

CHANGES

1. go get go@1.23.0
2. go mod tidy
3. go mod vendor
4. go fix ./...
5. go mod edit -toolchain=none

REFERENCES

> all: upgrade go directive to at least 1.23.0 [generated]
>
> By now Go 1.24.0 has been released, and Go 1.22 is no longer supported
> per the Go Release Policy (https://go.dev/doc/devel/release#policy).
>
> For golang/go#69095.

See also:

- golang/crypto@89ff08d
- golang/sys@74cfc93

go.mod

@@ -1,6 +1,6 @@
 module github.com/atc0005/safelinks
 
-go 1.22.0
+go 1.23.0
 
 require (
 	fyne.io/fyne/v2 v2.5.4