Histogram hover template doesn't recognise trace name

Hi,

I have been customising the hover template of a histogram, but it doesn't seem to recognise the name keyword when added to the template. Plotly version 5.10.0

import plotly.graph_objects as go
x = [1, 2, 2, 1, 2, 2, 3]

fig = go.Figure()
fig = fig.add_histogram(name='example', x=x, hovertemplate='%{name}')
fig.show()

The result (with hover):

What I should get: Same as above, but with %{name} replaced with example.

从 issue #3864 中提供的 Python 复现代码开始，跟踪 histogram hovertemplate 如何处理 %{name} token。完成的标准是：将鼠标悬停在已命名的直方图上时，渲染出 "example"，而不是让 token 保持未解析状态。