fix: add strikethrough support to deserializeMd

[abhi-bc]

Checklist

• [x] yarn typecheck
• [x] yarn lint:fix
• [x] yarn test
• [x] yarn brl
• [x] yarn changeset
• [x] ui changelog

Addresses issue: https://github.com/udecode/plate/issues/3733

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🦋 Changeset detected

Latest commit: 7d8991569d0e18c5f1e62b652001d60ffe64795d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

| Name | Type | | ----------------------- | ----- | | @udecode/plate-markdown | Patch | | @udecode/plate-ai | Patch | | @udecode/plate | Patch |

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Name	Status	Preview	Comments	Updated (UTC)
plate	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 13, 2024 10:00pm

[zbeyens]

Awesome fix! Thanks.