docs: remove reference to npm-packlist (#6306)

the bin no longer ships in `npm-packlist@7`

Author: staff0rd

docs/lib/content/commands/npm-publish.md

@@ -50,7 +50,7 @@ to the registry.
 
 ### Files included in package
 
-To see what will be included in your package, run `npx npm-packlist`.  All
+To see what will be included in your package, run `npm pack --dry-run`.  All
 files are included by default, with the following exceptions:
 
 - Certain files that are relevant to package installation and distribution