Pyodide packages needed rebuilding, and the pyodide project has
moved on a bit so a new version number is needed. The new packages
have already been built and pushed to S3.
To verify, go to `sandbox/pyodide` and follow the README there.
Then at top level do `GRIST_SANDBOX_FLAVOR=pyodide`. Try to
create and edit a document using formulas. It should work.
A chardet dependency had changed, breaking a grist-electron upgrade.
So I reran the pyodide script to build the new one, and pushed it
to our CDN. This file changed. I don't see exactly where it plays
a role, but I thought I'd better commit it anyway.