Text change to About dialog (#4166)

* Update about_build_modal.jsx

* Update en.json

webapp/components/about_build_modal.jsx

@@ -96,7 +96,7 @@ export default class AboutBuildModal extends React.Component {
                     <div className='form-group'>
                         <FormattedMessage
                             id='about.licensed'
-                            defaultMessage='Licensed by:'
+                            defaultMessage='Licensed to:'
                         />
                         &nbsp;{license.Company}
                     </div>

webapp/i18n/en.json

@@ -8,7 +8,7 @@
   "about.enterpriseEditione1": "Enterprise Edition",
   "about.hash": "Build Hash:",
   "about.hashee": "EE Build Hash:",
-  "about.licensed": "Licensed by:",
+  "about.licensed": "Licensed to:",
   "about.number": "Build Number:",
   "about.teamEditionLearn": "Join the Mattermost community at ",
   "about.teamEditionSt": "All your team communication in one place, instantly searchable and accessible anywhere.",