docs: change cardgrid link to keboola docs guide (#922)

Author: TC-MO

sources/platform/integrations/index.mdx

@@ -138,7 +138,7 @@ The Apify platform integrates with popular ETL and data pipeline services, enabl
 <CardGrid>
     <Card
         title="Keboola"
-        to="https://help.apify.com/en/articles/2003234-keboola-integration"
+        to="./integrations/keboola"
         imageUrl="/img/platform/integrations/keboola.svg"
         smallImage
     />