message: fix(config): fix config.xml syntax
diff: <description>An awesome Ionic/Cordova app.</description>
  <author email="contact@papers.ch" href="https://papers.ch/">Papers.ch Team</author>
  <content src="index.html" />
  - <allow-intent href="https://github.com/*">
  - <allow-intent href="https://play.google.com/*">
  - <allow-intent href="https://airgap.it/*">
  + <allow-intent href="https://github.com/*" />
  + <allow-intent href="https://play.google.com/*" />
  + <allow-intent href="https://airgap.it/*" />
  <preference name="ScrollEnabled" value="false" />
  <preference name="android-minSdkVersion" value="19" />
  <preference name="BackupWebStorage" value="none" />
  