Update ecosystem.md

site/ecosystem.md

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 - [Scalene](https://github.com/plasma-umass/scalene): A CPU+GPU+memory profiler for Python.
 - [CSrankings](https://csrankings.org): a metrics-based ranking of top computer science institutions around the world.
 - [prolly-yes.com](https://probability.prolly-yes.com) An online graphical interface for probability distributions. Leverages Vega to create beautiful and intuitive visualizations.
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 ## Tools for Embedding Vega-Lite Visualizations
 
 - <span class="octicon octicon-star"></span> [Vega-Embed](https://github.com/vega/vega-embed), a convenience wrapper for Vega and Vega-Lite.