doc: move os.machine() docs to sorted position

This commit moves the os.machine() docs so that the API list
is sorted.

PR-URL: nodejs#45647
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: cjihrig

doc/api/os.md

@@ -220,6 +220,24 @@ system and expressed as a fractional number.
 The load average is a Unix-specific concept. On Windows, the return value is
 always `[0, 0, 0]`.
 
+## `os.machine()`
+
+<!-- YAML
+added:
+  - v18.9.0
+  - v16.18.0
+-->
+
+* Returns {string}
+
+Returns the machine type as a string, such as `arm`, `arm64`, `aarch64`,
+`mips`, `mips64`, `ppc64`, `ppc64le`, `s390`, `s390x`, `i386`, `i686`, `x86_64`.
+
+On POSIX systems, the machine type is determined by calling
+[`uname(3)`][]. On Windows, `RtlGetVersion()` is used, and if it is not
+available, `GetVersionExW()` will be used. See
+<https://en.wikipedia.org/wiki/Uname#Examples> for more information.
+
 ## `os.networkInterfaces()`
 
 <!-- YAML
@@ -452,24 +470,6 @@ On POSIX systems, the operating system release is determined by calling
 available, `GetVersionExW()` will be used. See
 <https://en.wikipedia.org/wiki/Uname#Examples> for more information.
 
-## `os.machine()`
-
-<!-- YAML
-added:
-  - v18.9.0
-  - v16.18.0
--->
-
-* Returns {string}
-
-Returns the machine type as a string, such as `arm`, `arm64`, `aarch64`,
-`mips`, `mips64`, `ppc64`, `ppc64le`, `s390`, `s390x`, `i386`, `i686`, `x86_64`.
-
-On POSIX systems, the machine type is determined by calling
-[`uname(3)`][]. On Windows, `RtlGetVersion()` is used, and if it is not
-available, `GetVersionExW()` will be used. See
-<https://en.wikipedia.org/wiki/Uname#Examples> for more information.
-
 ## OS constants
 
 The following constants are exported by `os.constants`.