Fix notebook-renderers compile error

[rzhao271]

There's a compile error that shows up in notebook-renderers depending on what's run.

yarn gulp compile-extensions-build <- OK, and also used by CI/build pipelines
yarn gulp compile-extension:notebook-renderers <- fail, but used by yarn compile or yarn watch
yarn gulp compile-extensions-build-legacy <- fail

I noticed that notebook-renderers is using esbuild, but I'm not sure how that causes the difference in behaviour above.

CC @joaomoreno