Update migration assessment instructions

Added a note about clearing browser cache for assessment visibility.

Author: ssindhub

articles/data-factory/how-to-assess-your-azure-data-factory-to-fabric-data-factory-migration.md

@@ -12,6 +12,8 @@ ms.custom: pipelines
 Use the built-in upgrade assessment to quickly check pipeline readiness and identify activity compatibility issues before migrating to Fabric.
 
 In [Azure Data Factory](https://adf.azure.com), open the factory you'd like to assess for migration. On the authoring canvas toolbar, select Start assessment (preview).
+> [!NOTE]
+> If you are unable to see the banner where the "Start assesssment" button is located, try clearing your browser cache and cookies. This often resolves display issues.
 
 :::image type="content" source="media/how-to-assess-your-azure-data-factory-to-fabric-data-factory-migration/run-upgrade-assessment.png" alt-text="Screenshot showing how to run the Assessment tool.":::