Node link is hardcoded to mathlib in generated html

[SnO2WMaN]

I generated import-graph visualization and deployed to https://formalizedformallogic.github.io/Foundation/book/assets/import_graph.html, but link in node is hardcoded to mathlib's doc.

I know it works when add queryparam e.g. https://formalizedformallogic.github.io/Foundation/book/assets/import_graph.html?docs_url=https://formalizedformallogic.github.io/Foundation/doc/, but it might be good to be able to pass the parameter as url when generating by CLI like lake exe html --doc https://formalizedformallogic.github.io/Foundation/doc.