Issue 1325: Correct create README.md (#1326)

This pull request corrects a typo in the README.md for the "create"
package, correcting the second documented command from `pattern-lab init`
to `patternlab init`.

Author: lhridley

packages/create/README.md

@@ -12,5 +12,5 @@ This is the same as using the main Pattern Lab CLI's `init` command:
 
 ```bash
 npm i -g @pattern-lab/cli
-pattern-lab init
+patternlab init
 ```