[charts-pro] Mark FunnelChart as stable

[JCQuintas]

• export FunnelChart
• keep exporting Unstable_FunnelChart to prevent breaking changes

[JCQuintas]

@alexfauquette do we need to keep exporting Unstable_FunnelChart? I saw we did that in the Radar chart so I kept it, but it feels a bit weird. 😄

[mui-bot]

Deploy preview: https://deploy-preview-19048--material-ui-x.netlify.app/

Updated pages:

• docs/data/charts/funnel/funnel.md
• docs/data/charts/pyramid-demo/pyramid.md

Bundle size report

Bundle	Parsed Size	Gzip Size
@mui/x-data-grid	0B(0.00%)	0B(0.00%)
@mui/x-data-grid-pro	0B(0.00%)	0B(0.00%)
@mui/x-data-grid-premium	0B(0.00%)	0B(0.00%)
@mui/x-charts	0B(0.00%)	0B(0.00%)
@mui/x-charts-pro	🔺+25B(+0.01%)	🔺+10B(+0.01%)
@mui/x-date-pickers	0B(0.00%)	0B(0.00%)
@mui/x-date-pickers-pro	0B(0.00%)	0B(0.00%)
@mui/x-tree-view	0B(0.00%)	0B(0.00%)
@mui/x-tree-view-pro	0B(0.00%)	0B(0.00%)

Details of bundle changes

Generated by 🚫 dangerJS against 34fdf66

[codspeed-hq]

CodSpeed Performance Report

Merging #19048 will not alter performance

_{Comparing JCQuintas:funnel-stable (add0e70) with master (9ce51f6)¹}

Summary

✅ 10 untouched benchmarks

Footnotes

1. No successful run was found on master (55680dc) during the generation of this report, so 9ce51f6 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[bernardobelchior]

Should we do something like this so people are inclined to migrate?

Suggested change

	export { FunnelChart } from './FunnelChart';
	/**
	* @deprecated funnel chart is now stable, import `FunnelChart` instead
	*/
	export const Unstable_FunnelChart = FunnelChart;