Update icicle-charts.md

Author: LiamConnors

Diff for: doc/python/icicle-charts.md

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     description: How to make Icicle Charts.
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@@ -418,6 +418,30 @@ fig.update_layout(margin = dict(t=50, l=25, r=25, b=25))
 fig.show()
 ```
 
+### Pattern Fills
+
+*New in 5.15*
+
+Icicle charts support [patterns](/python/pattern-hatching-texture/) (also known as hatching or texture) in addition to color. In this example, we apply a pattern to all chart sections. We also configure the size and solidity of the pattern.
+
+```python
+import plotly.graph_objects as go
+
+fig = go.Figure(
+    go.Icicle(
+        labels=["Eve", "Cain", "Seth", "Enos", "Noam", "Abel", "Awan", "Enoch", "Azura"],
+        parents=["", "Eve", "Eve", "Seth", "Seth", "Eve", "Eve", "Awan", "Eve"],
+        values=[10, 14, 12, 10, 2, 6, 6, 4, 4],
+        root_color="lightgrey",
+        textfont_size=20,
+        marker=dict(pattern=dict(shape="|", size=5, solidity=0.9)),
+    )
+)
+
+fig.update_layout(margin=dict(t=50, l=25, r=25, b=25))
+fig.show()
+```
+
 ### Set the Direction of Icicle charts
 
 As mentioned above, Icicle charts can grow in one of four directions. Icicle charts have a `tiling` attribute and this has two attributes: `orientation` and `flip`. `orientation` takes either `h` (horiztonal) or `v` (vertical) and `flip` takes either `x` or `y`. You can use these two attributes in combination to create each of the four cardinal directions: left, right, top, bottom.