Problem

Vega-Embed keeps references until you call result.finalize. We currently only call view.finalize.

Solution

Change https://github.com/streamlit/streamlit/blob/develop/frontend/src/components/elements/VegaLiteChart/VegaLiteChart.tsx#L283 to result.finalize as described in https://github.com/vega/vega-embed#embed.