Change link url to zip file to match names created by github tags

Version: 0.0.13

In
* file: script.js
* function: add_current_version_zip_file_link_to_button

Change
FROM:
```javascript
        let version = "v" + semver
        let filename = "commitlint_d-oh-" + version + ".zip"
```

TO:
```javascript
        let filename = "commitlint_doh-" + semver + ".zip"
```

* change the name spelling
* Remove 'v' before version number
* Use the semver input directly