docs: add fractions to the list of supported values in XY cell docs

diff --git a/docs/pages/xy-grid.md b/docs/pages/xy-grid.md
index e32144f29f043031f957584137c9f57ee4072296..cd7af96ef4b42731f3d465f4b95c3e04c7f902d1 100644 (file)
--- a/docs/pages/xy-grid.md
+++ b/docs/pages/xy-grid.md
@@ -400,7 +400,7 @@ This is especially powerful as you can specify where you want the gutters, like
 ### Cells
 
 Use the `xy-cell()` mixin to create a cell. There are a number of ways to define the size of a cell.
-`xy-cell` accepts a few different keywords as well as specific sizes: `full` (full width), `auto` (automatic width) and `shrink` (take up only the space it needs).
+`xy-cell` accepts a few different keywords as well as specific sizes: `full` (full width), `auto` (automatic width) and `shrink` (take up only the space it needs) or any fraction (`6`, `50%`, `1 of 2` or `1/2`...).
 
 ```scss
 .main-content {