Update README.md (#248)
Update README.md (#248)

Fixed spelling error
benfjohnson/developer-dot,ted-spence-avalara/developer-dot,benfjohnson/developer-dot,ted-spence-avalara/developer-dot,mlsnyder/developer-dot,bob-erdman/developer-dot,ted-spence-avalara/developer-dot,benfjohnson/developer-dot,mlsnyder/developer-dot,bob-erdman/developer-dot,bob-erdman/developer-dot,mlsnyder/developer-dot,bob-erdman/developer-dot,ted-spence-avalara/developer-dot,mlsnyder/developer-dot,ted-spence-avalara/developer-dot,benfjohnson/developer-dot,bob-erdman/developer-dot,mlsnyder/developer-dot,benfjohnson/developer-dot