Explicitly call out the --decimals argument to spl-token create-token

Author: mvines

docs/src/token.md

@@ -237,9 +237,9 @@ CqAxDdBRnawzx9q4PYM3wrybLHBhDZ4P6BTV13WsRJYJ  AQoKYV7tYpTrFZN6P5oUufbQKAUr9mNYGe
 
 ### Example: Create a non-fungible token
 
-Create the token type,
+Create the token type with nine decimal places,
 ```
-$ spl-token create-token
+$ spl-token create-token --decimals 9
 Creating token 559u4Tdr9umKwft3yHMsnAxohhzkFnUBPAFtibwuZD9z
 Signature: 4kz82JUey1B9ki1McPW7NYv1NqPKCod6WNptSkYqtuiEsQb9exHaktSAHJJsm4YxuGNW4NugPJMFX9ee6WA2dXts
 ```