Add type hint to font-weight custom property entry

Author: philipp-spiess

src/docs/font-family.mdx

@@ -17,7 +17,7 @@ export const description = "Utilities for controlling the font family of an elem
       "font-mono",
       "font-family: var(--font-mono); /* ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace */",
     ],
-    ["font-(<custom-property>)", "font-family: var(<custom-property>);"],
+    ["font-(family-name:<custom-property>)", "font-family: var(<custom-property>);"],
     ["font-[<value>]", "font-family: <value>;"],
   ]}
 />