one more test for brand logo shortcode with unified brand

just for completeness

Author: gordonwoodhull

tests/docs/smoke-all/shortcodes/brand-logo-unified-brand-both.qmd

@@ -0,0 +1,25 @@
+---
+title: Test brand light/dark shortcodes
+format: html
+brand:
+  logo:
+    small:
+      light: sun.png
+      dark: moon.png
+  color:
+    background:
+      light: '#fff'
+      dark: '#000'
+_quarto:
+  tests:
+    html:
+      ensureHtmlElements:
+        -
+          - 'img[src="sun.png"][class*="light-content"]'
+          - 'img[src="moon.png"][class*="dark-content"]'
+        - []
+---
+
+
+{{< brand logo small >}}
+