Update URLs to open-workflow-specification.org and new GitHub org - #6

Update URLs to open-workflow-specification.org and new GitHub org#6

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open-workflow-specification:mainopen-workflow-specification/open-workflow-specification.github.io:mainfrom

ricardozanini:rename-uriricardozanini/open-workflow-specification.github.io:rename-uriCopy head branch name to clipboard