lit: incorrect warning about multiple versions in dev mode

[florian-sanders-cc]

Context

We have updated Lit to latest but we still get a message telling us that multiple versions of lit are being used.

When troubleshooting, it shows that the same version of lit seems to be loaded several times?

This may be "normal" in the Storybook context since the Storybook renderer relies on Lit and our components do too but it's surprising that it's not deduped somehow?
npm ls looks clean so we're almost sure we're not shipping different lit versions in production at least.