go.mod: Bump Go version to 1.23.0

It is really unfortunate that golang has decided to come up with
an automation[1] to update `go` directive in go.mod from various
repositories including x/repos following the release cadence in
general. Another interesting and visible change is to explicitly
specify the minor version as a suffix to the major version. Thus
we are bound to update our `go` directive as we require many of
the golang x/repos.

[1] golang/go#69095

Signed-off-by: Anoop C S <[email protected]>

Author: anoopcs9

go.mod

@@ -1,6 +1,6 @@
 module github.com/samba-in-kubernetes/samba-operator
 
-go 1.19
+go 1.23.0
 
 require (
 	github.com/go-logr/logr v1.2.3