docs: Add sample for --ignore-pattern to use with mutliple pattern (#…

…420)

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

**Thank you for your contribution!** 🙌

To get it merged faster, kindly review the checklist below:

## Pull Request Checklist
- [ ] Reviewed the [Contributing
Guidelines](https://github.com/SAP/ui5-linter/blob/main/CONTRIBUTING.md#-contributing-code)
+ Especially the [How to
Contribute](https://github.com/SAP/ui5-linter/blob/main/CONTRIBUTING.md#how-to-contribute)
section
- [ ] [No merge
commits](https://github.com/SAP/ui5-linter/blob/main/docs/Guidelines.md#no-merge-commits)
- [ ] [Correct commit message
style](https://github.com/SAP/ui5-linter/blob/main/docs/Guidelines.md#commit-message-style)

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/test/e2e/**"
 ```
 
 #### `--config`