alt text fix

Author: v-dirichards

articles/data-factory/known-issues-troubleshoot-guide.md

@@ -31,4 +31,4 @@ This page lists the known issues in Azure Data factory. Before submitting [an Az
 Intermittently, lookup queries against Snowflake return no values even when results are expected. No errors are generated, and the lookup activity completes successfully. This issue has been observed with Managed VNet IR and SHIR.
 
 **Workaround**: Add an If-condition activity after the Lookup to check its output. If the Lookup returns data, proceed without further action. If no data is returned, re-execute the Lookup activity.
-:::image type="content" source="media/known-issue/snowflake-rcs.png" alt-text="Snowflake v2 Known issue":::
+:::image type="content" source="media/known-issue/snowflake-rcs.png" alt-text="Diagram of Snowflake v2 Known issue.":::