Fix grammar in checkOrigin error message

[Copilot]

Corrects grammar error in the checkOrigin validation error message.

Changes:

• Fixed error message text from "by providing of array of trusted domains" to "by providing an array of trusted domains"

The error message is thrown when an iframe message is received from an untrusted origin:

throw new Error(
  `Unexpected message received from: ${origin} for ${id}. Message was: ${data}. This error can be disabled by setting the checkOrigin: false option or by providing an array of trusted domains.`,
)

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