updates

Author: arvindrk

fern/observability/evals-advanced.mdx

@@ -1067,11 +1067,13 @@ Build up complexity gradually:
   </Card>
 
 {" "}
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 <Card title="Assistants guide" icon="robot" href="/assistants/quickstart">
   Learn to build and configure assistants for testing
 </Card>
 
 {" "}
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 <Card title="Tools documentation" icon="wrench" href="/tools/custom-tools">
   Build custom tools and test their behavior
 </Card>