chore: Bump to Go version 1.23.1

Go 1.23.1 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: https://groups.google.com/g/golang-announce/c/K-cEzDeCtpc

.go-version

@@ -1 +1 @@
-1.23.0
+1.23.1

api/go.mod

@@ -1,6 +1,6 @@
 module github.com/hashicorp/boundary/api
 
-go 1.23.0
+go 1.23.1
 
 require (
 	github.com/hashicorp/boundary/sdk v0.0.40

go.mod

@@ -1,6 +1,6 @@
 module github.com/hashicorp/boundary
 
-go 1.23.0
+go 1.23.1
 
 replace github.com/hashicorp/boundary/api => ./api
 

sdk/go.mod

@@ -1,6 +1,6 @@
 module github.com/hashicorp/boundary/sdk
 
-go 1.23.0
+go 1.23.1
 
 require (
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.1