fix: correct typo 'Successfull' to 'Successful' in SendTransaction

[Zentex1337]

Summary

• Fix spelling error in the transaction success notification message
• 'Transaction Successfull' -> 'Transaction Successful'

Test plan

• Simple string change, no functional changes
• Users will now see correctly spelled success message

[changeset-bot]

⚠️ No Changeset found

Latest commit: 6d0d9b2

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