Update README.md

Author: diego-antonelli

README.md

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 Please see [Microflow Timer](https://docs.mendix.com/appstore/widgets/microflow-timer) in the Mendix documentation for details.
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+## Raising problems/issues
+-   We encourage everyone to open a Support ticket on [Mendix Support](https://support.mendix.com) in case of problems with widgets or scaffolding tools (Pluggable Widgets Generator or Pluggable Widgets Tools)