add textfont style, variant and weight

Author: LiamConnors

Diff for: doc/python/text-and-annotations.md

@@ -307,7 +307,9 @@ fig.update_layout(
 fig.show()
 ```
 
-### Custom Text Color and Styling
+### Font Color, Size, and Familiy
+
+Use `textfont` to specify a font `family`, `size`, or `color`.
 
 ```python
 import plotly.graph_objects as go
@@ -347,6 +349,52 @@ fig.update_layout(showlegend=False)
 fig.show()
 ```
 
+### Font Style, Variant, and Weight
+
+*New in 5.22*
+
+You can also configure a font's `variant`, `style`, and `weight` on `textfont`. Here, we configure an `italic` style on the first bar, `bold` weight on the second, and`small-caps` as the font variant on the third.
+
+```python
+import plotly.graph_objects as go
+from plotly import data
+
+df = data.medals_wide()
+
+fig = go.Figure(
+    data=[
+        go.Bar(
+            x=df.nation,
+            y=df.gold,
+            name="Gold",
+            marker=dict(color="Gold"),
+            text="Gold",
+            textfont=dict(style="italic"),
+        ),
+        go.Bar(
+            x=df.nation,
+            y=df.silver,
+            name="Silver",
+            marker=dict(color="MediumTurquoise"),
+            text="Silver",
+            textfont=dict(weight="bold"),
+        ),
+        go.Bar(
+            x=df.nation,
+            y=df.bronze,
+            name="Bronze",
+            marker=dict(color="LightGreen"),
+            text="Bronze",
+            textfont=dict(variant="small-caps"),
+        ),
+    ],
+    layout=dict(barcornerradius=15, showlegend=False),
+)
+
+fig.show()
+
+```
+
 ### Styling and Coloring Annotations
 
 ```python