chore: add changeset

.changeset/rotten-beers-protect.md

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+---
+"@tiptap/react": minor
+"@tiptap/core": minor
+---
+
+This PR significantly improves the performance of React NodeViews in a couple of ways:
+
+- It now uses useSyncExternalStore to synchronize changes between React & the editor instance
+- It dramatically reduces the number of re-renders by re-using instances of React portals that have already been initialized and unaffected by the change made in the editor
+
+We were seeing performance problems with React NodeViews because a change to one of them would cause a re-render to all instances of node views. For an application that heavily relies on node views in React, this was quite expensive.
+This should dramatically cut down on the number of instances that have to re-render, and, making each of those re-renders much less costly.