Add `key` prop to RTE decorated entities (Pills and links)
Add `key` prop to RTE decorated entities (Pills and links)

This will cause a re-render when the URL of the pill/link changes.

fixes vector-im/riot-web#4718

aperezdc/matrix-react-sdk,matrix-org/matrix-react-sdk,aperezdc/matrix-react-sdk,aperezdc/matrix-react-sdk,aperezdc/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk