docs: ✏️ change link to convert function reference docs (#91)

# Description

So it's aligned with how it's done in #90

Needs a quick review.

Author: signekb

vignettes/design.qmd

@@ -85,7 +85,7 @@ details.
 This function takes one or more register SAS files and converts them to
 a Parquet file or a Parquet dataset partitioned by year.
 
-See `help(convert_to_parquet)` for more details.
+See the `convert_to_parquet()` reference for more details.
 
 The function requires two inputs: