[programming][go] Update Go

to the latest version.

Also explain how to install it on macOS.

src/programming/go.rst

@@ -32,20 +32,28 @@ Tutorials
 Installation
 ------------
 
-`Download Go <https://golang.org/dl/>`__, extract it, add the new Go binary $PATH and load it. [11]
+`Download Go <https://golang.org/dl/>`__, extract it, add the new Go binary $PATH, and load it. [11]
 
-.. code-block:: sh
+-  Linux
 
-   $ export GO_VERSION="1.19.2"
-   $ export GO_OS="linux"
-   $ export GO_ARCH="amd64"
+   .. code-block:: sh
 
-.. code-block:: sh
+      $ export GO_VERSION="1.23.1"
+      $ export GO_OS="linux"
+      $ export GO_ARCH="amd64"
+
+   .. code-block:: sh
+
+      $ wget https://dl.google.com/go/go${GO_VERSION}.${GO_OS}-${GO_ARCH}.tar.gz
+      $ tar -C /usr/local -x -z -f go${GO_VERSION}.${GO_OS}-${GO_ARCH}.tar.gz
+      $ echo "PATH=$PATH:/usr/local/go/bin" >> ~/.profile
+      $ . ~/.profile
+
+-  macOS
+
+  .. code-block:: sh
 
-   $ wget https://dl.google.com/go/go${GO_VERSION}.${GO_OS}-${GO_ARCH}.tar.gz
-   $ tar -C /usr/local -x -z -f go${GO_VERSION}.${GO_OS}-${GO_ARCH}.tar.gz
-   $ echo "PATH=$PATH:/usr/local/go/bin" >> ~/.profile
-   $ . ~/.profile
+     $ brew install go
 
 Release Cycle
 -------------