`writeAttributeEscaped` erroneously included in SinkModel

[jeongsoolee09]

See https://github.com/advanced-security/codeql-sap-js/blob/b1c726bc6bae78c800f435e6aee4f00a88ba8de9/.github/codeql/extensions/ui5-data-extensions.yml#L105C77-L105C77

The documentation on writeAttributeEscaped states that the value is encoded to avoid XSS attacks.

[mbaluda]

Fixed in PR #40