Update treemaps.md

Author: LiamConnors

doc/python/treemaps.md

@@ -6,7 +6,7 @@ jupyter:
       extension: .md
       format_name: markdown
       format_version: '1.3'
-      jupytext_version: 1.14.1
+      jupytext_version: 1.14.6
   kernelspec:
     display_name: Python 3 (ipykernel)
     language: python
@@ -20,7 +20,7 @@ jupyter:
     name: python
     nbconvert_exporter: python
     pygments_lexer: ipython3
-    version: 3.8.0
+    version: 3.10.11
   plotly:
     description: How to make Treemap Charts with Plotly
     display_as: basic
@@ -423,6 +423,28 @@ fig.update_layout(
 fig.show()
 ```
 
+### Pattern Fills
+
+*New in 5.15*
+
+Treemap 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 the root node.
+
+```python
+import plotly.graph_objects as go
+
+fig = go.Figure(go.Treemap(
+    labels = ["Eve","Cain", "Seth", "Enos", "Noam", "Abel", "Awan", "Enoch", "Azura"],
+    parents = ["", "Eve", "Eve", "Seth", "Seth", "Eve", "Eve", "Awan", "Eve"],
+    root_color="lightgrey",
+    textfont_size=20,
+    marker=dict(
+        pattern=dict(shape=["|"], solidity=0.80)
+    )
+))
+
+fig.show()
+```
+
 #### Reference
 
 See [function reference for `px.treemap()`](https://plotly.com/python-api-reference/generated/plotly.express.treemap) or https://plotly.com/python/reference/treemap/ for more information and chart attribute options!