aioos

Update overview.md

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fix: error word - [x] I have read the [Contributing Documents](https://github.com/DaftMonk/generator-angular-fullstack/blob/master/contributing.md) - [x] My commit(s) follow the [AngularJS commit message guidelines](https://docs.google.com/document/d/1QrDFcIiPjSLDn3EL15IJygNPiHORgU1_OOAqWjiDU5Y/) - [x] The generator's tests pass (`generator-angular-fullstack$ npm test`)