create.md in lono-4.0.2

- old
+ new

@@ -10,12 +10,12 @@
 
   lono cfn create my-stack --template different1
 
 The template used is `output/templates/different1.json` and the parameters used is `output/params/different1.json`.
 
-  lono cfn create my-stack --params different2
+  lono cfn create my-stack --param different2
 
 The template used is `output/templates/my-stack.json` and the parameters used is `output/params/different2.json`.
 
-  lono cfn create my-stack --template different3 --params different4
+  lono cfn create my-stack --template different3 --param different4
 
 The template used is `output/templates/different3.json` and the parameters used is `output/params/different4.json`.