Update dependency @blocknote/shadcn to v0.42.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Confidence
@blocknote/shadcn (source)	0.42.0 -> 0.42.3

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Release Notes

TypeCellOS/BlockNote (@​blocknote/shadcn)

v0.42.3

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🩹 Fixes

• disallow access to the domElement or isFocused if the editor is unmounted (#​2187)

❤️ Thank You

• Nick Perez

v0.42.2

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🩹 Fixes

• put back mounting system (#​2183)

❤️ Thank You

• Nick Perez

v0.42.1

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🩹 Fixes

• do not error on invalid backgroundColor or textColor #​2176 (#​2179, #​2176)
• remove dependency array from comments re-rendering (#​2177)

❤️ Thank You

• Nick Perez

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Configuration

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