fix(deps): update dependency lit-element to ^4.0.6

[tradeshift-renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
lit-element (source)	dependencies	patch	^4.0.5 -> ^4.0.6

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Release Notes

lit/lit (lit-element)

### [`v4.0.6`](https://togithub.com/lit/lit/blob/HEAD/packages/lit-element/CHANGELOG.md#406) [Compare Source](https://togithub.com/lit/lit/compare/lit-element@4.0.5...lit-element@4.0.6) ##### Patch Changes - [#​4646](https://togithub.com/lit/lit/pull/4646) [`abf30b3e`](https://togithub.com/lit/lit/commit/abf30b3e895ea5d833f6d9559612e2b1ba47580d) - The value provided by the `ref()` directive will always be `undefined` when the element is disconnected.

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