Add note about not supported ruby feature (#37988)

* Add note about not supported ruby feature * Apply suggestions from code review
mdn · Feb 6, 2025 · c264651 · c264651
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commit c264651
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diff --git a/files/en-us/web/css/css_ruby_layout/index.md b/files/en-us/web/css/css_ruby_layout/index.md
@@ -16,6 +16,13 @@ The **CSS ruby layout** module provides the rendering model and formatting contr
 - {{cssxref("ruby-align")}}
 - {{cssxref("ruby-position")}}
 
+> [!NOTE]
+> CSS ruby layout module introduces two properties that have not been implemented: `ruby-merge`, `ruby-overhang`.
+
+## Related concepts
+
+- {{Glossary("ruby")}}
+
 ## Specifications
 
 {{Specifications}}