Update README.md

Author: RoelantVos

README.md

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-> **_NOTE:_**  the formal [Data Warehouse Automation Schema documentation]([https://link-url-here.org](https://data-solution-automation-engine.github.io/data-warehouse-automation-metadata-schema/)) is now available on Github pages.
+> **_NOTE:_**  the formal [Data Warehouse Automation Schema documentation](https://data-solution-automation-engine.github.io/data-warehouse-automation-metadata-schema/) is now available on Github pages.
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 # Generation Metadata Schema for Data Warehouse Automation