Created by: jsoref
This PR corrects misspellings identified by the check-spelling action.
The misspellings have been reported at https://github.com/jsoref/design/commit/ffbe956ec2f255d3d2e7a99a31e57aee61a40597#commitcomment-67549517
The action reports that the changes in this PR would make it happy: https://github.com/jsoref/design/commit/4337c2a05d56b4e027b5af89350e50a2dfdcd780
Note: this PR does not include the action. If you're interested in running a spell check on every PR and push, that can be offered separately.