Docs: add minmax()

Author: jessicarush

css_misc_notes.md

@@ -65,4 +65,10 @@ To use `clamp()`, enter three values: a minimum value, ideal value (from which t
 see also: <https://web.dev/min-max-clamp>
 
 
-## minmax()
+## minmax()
+
+> The minmax() CSS function defines a size range greater than or equal to min and less than or equal to max. It is used with CSS Grids.
+
+## repeat()
+
+Note the difference between `auto-fit` and `auto-fill`.