doc: provide more guidance about process.version

PR-URL: #34909
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

doc/api/process.md

@@ -2445,13 +2445,16 @@ added: v0.1.3
 
 * {string}
 
-The `process.version` property returns the Node.js version string in the form of
-`v<major>.<minor>.<patch>`.
+The `process.version` property contains the Node.js version string.
 
 ```js
 console.log(`Version: ${process.version}`);
+// Version: v14.8.0
 ```
 
+To get the version string without the prepended _v_, use
+`process.versions.node`.
+
 ## `process.versions`
 <!-- YAML
 added: v0.2.0