docs(readme): update usage

Author: remarkablemark

README.md

@@ -21,12 +21,24 @@ pipx install python_cli_template
 
 ## Usage
 
-Print greeting:
+Greet name:
 
 ```sh
 python_cli_template --name world
 ```
 
+Check version:
+
+```sh
+python_cli_template --version
+```
+
+See help:
+
+```sh
+python_cli_template --help
+```
+
 ## License
 
 [MIT](https://github.com/remarkablemark/python_cli_template/blob/master/LICENSE)