Replace hyperlink for using a SQL expression in a data test #962
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Problem
While writing up dbt-labs/docs.getdbt.com#6436, noticed that the content of a link got moved to a different page in the dbt product documentation.
Solution
Replace with the link to the new page + section heading.
Checklist
I have run this code in development and it appears to resolve the stated issueI have updated the README.md (if applicable)