docs: add github-repo-stats to ecosystem (#7171)
docs: add github-repo-stats to ecosystem (#7171)

context: https://github.com/jgehrcke/github-repo-stats/issues/1
vega/vega-lite,vega/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite