docs: clarify npm init @latest behavior (#4435)

Closes: #3821

docs/content/commands/npm-init.md

@@ -38,6 +38,15 @@ strictly additive, so it will keep any fields and values that were already
 set. You can also use `-y`/`--yes` to skip the questionnaire altogether. If
 you pass `--scope`, it will create a scoped package.
 
+*Note:* if a user already has the `create-<initializer>` package
+globally installed, that will be what `npm init` uses.  If you want npm
+to use the latest version, or another specific version you must specify
+it:
+
+* `npm init foo@latest` # fetches and runs the latest `create-foo` from
+    the registry
+* `npm init foo@1.2.3` #  runs `create-foo@1.2.3` specifically
+
 #### Forwarding additional options
 
 Any additional options will be passed directly to the command, so `npm init