fix(editor): Update image sizes in template description not to be full width always (#8037)

## Summary
Update image sizes in template description not to be full width always.


## Related tickets and issues

https://linear.app/n8n/issue/ADO-1506/bug-fix-images-in-template-descriptions


## Review / Merge checklist
- [X] PR title and summary are descriptive. **Remember, the title
automatically goes into the changelog. Use `(no-changelog)` otherwise.**
([conventions](https://github.com/n8n-io/n8n/blob/master/.github/pull_request_title_conventions.md))
- [ ] [Docs updated](https://github.com/n8n-io/n8n-docs) or follow-up
ticket created.
- [x] Tests included.
> A bug is not considered fixed, unless a test is added to prevent it
from happening again.
   > A feature is not complete without tests.

packages/editor-ui/src/views/TemplatesWorkflowView.vue

@@ -36,7 +36,7 @@
 				/>
 			</div>
 			<div :class="$style.content">
-				<div :class="$style.markdown">
+				<div :class="$style.markdown" data-test-id="template-description">
 					<n8n-markdown
 						:content="template && template.description"
 						:images="template && template.image"