Fix double-paste bug

[develra]

Fixes bug introduced by here where content is pasted twice - you can view this behavior on https://react-mentions.vercel.app/

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🦋 Changeset detected

Latest commit: d05143e4d7364262c86976e6dfd8270d8627d241

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

This PR includes changesets to release 1 package

| Name | Type | | -------------- | ----- | | react-mentions | Patch |

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Name	Status	Preview	Comments	Updated (UTC)
react-mentions	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 5, 2023 7:44am