Docs: update description and add alt text (#79538)

* Edited page description and added missing alt text

* Rebuilt markdown file

docs/sources/panels-visualizations/query-transform-data/transform-data/index.md

@@ -117,7 +117,7 @@ We recommend that you remove transformations that you don't need. When you delet
 1. Click the **Transform** tab.
 1. Click the trash icon next to the transformation you want to delete.
 
-{{< figure src="/static/img/docs/transformations/screenshot-example-remove-transformation.png" class="docs-image--no-shadow" max-width= "1100px" >}}
+{{< figure src="/static/img/docs/transformations/screenshot-example-remove-transformation.png" class="docs-image--no-shadow" max-width= "1100px" alt="A transformation row with the remove transformation icon highlighted" >}}
 
 ## Transformation functions