'heatmap' objects don't have these attributes: 'texttemplate'

According to the documentation, there should be a 'texttemplate' attribute to add text inside every cell of a heatmap.

But I'm getting this warning:

Warning: 'heatmap' objects don't have these attributes: 'texttemplate'
Valid attributes include:
'autocolorscale', 'coloraxis', 'colorbar', 'colorscale', 'connectgaps', 'customdata', 'customdatasrc', 'dx', 'dy', 'hoverinfo', 'hoverinfosrc', 'hoverlabel', 'hoverongaps', 'hovertemplate', 'hovertemplatesrc', 'hovertext', 'hovertextsrc', 'ids', 'idssrc', 'legendgroup', 'legendgrouptitle', 'legendrank', 'meta', 'metasrc', 'name', 'opacity', 'reversescale', 'showlegend', 'showscale', 'stream', 'text', 'textsrc', 'transforms', 'transpose', 'type', 'uid', 'uirevision', 'visible', 'x', 'x0', 'xaxis', 'xcalendar', 'xgap', 'xhoverformat', 'xperiod', 'xperiod0', 'xperiodalignment', 'xsrc', 'xtype', 'y', 'y0', 'yaxis', 'ycalendar', 'ygap', 'yhoverformat', 'yperiod', 'yperiod0', 'yperiodalignment', 'ysrc', 'ytype', 'z', 'zauto', 'zhoverformat', 'zmax', 'zmid', 'zmin', 'zsmooth', 'zsrc', 'key', 'set', 'frame', 'transforms', '_isNestedKey', '_isSimpleKey', '_isGraticule', '_bbox'

R version: 4.2.1
plotly version: 4.10.0

Am I doing something wrong, or is the documentation wrong?
Thank you for your help!

Start with the heatmap reference entry for the texttemplate attribute and compare it with the attributes accepted by plotly.R 4.10.0. Confirm whether the R heatmap object supports the documented attribute, then document the version-specific discrepancy or the correction needed so the behavior and documentation agree.