docs(readme): Add another pattern for --ignore-pattern in CLI usage

Improve the explanation of how multiple patterns can be used in the --ignore-pattern option, as it is not obvious

README.md

@@ -119,7 +119,7 @@ Pattern/files that will be ignored during linting. Can also be defined in `ui5li
 
 **Example:**
 ```sh
-ui5lint --ignore-pattern "webapp/thirdparty/**"
+ui5lint --ignore-pattern "webapp/thirdparty/**" "webapp/thirdparty/**"
 ```
 
 #### `--config`