Update persist_docs.md to reflect dbx fix (#5008)

Update persist_docs.md to reflect fixed databricks persist column
comments

dbt-labs/dbt-spark#372 (comment)

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website/docs/reference/resource-configs/persist_docs.md

@@ -131,7 +131,6 @@ Some known issues and limitations:
 <div warehouse="Databricks">
 
 - Column-level comments require `file_format: delta` (or another "v2 file format")
-- Column-level comments aren't supported for models materialized as <Term id="view">views</Term> ([issue](https://github.com/dbt-labs/dbt-spark/issues/372))
 
 
 </div>