Added a checkbox for the status in the project

Author: h-chmeruk

template/.github/PULL_REQUEST_TEMPLATE.md

@@ -11,4 +11,5 @@ Closes #
 ### Checklist for a complete Pull request
 - [ ] I have read the [contribution guidelines](https://pyfar-gallery.readthedocs.io/en/latest/contribute/index.html)
 - [ ] I have added/expanded tests according to the [testing guidelines](https://pyfar-gallery.readthedocs.io/en/latest/contribute/packages/testing.html).
-- [ ] I have added an entry to the [history file](../HISTORY.rst).
+- [ ] I have added an entry to the [history file](../HISTORY.rst).
+- [ ] I have checked the status (correct column, priority, size) of this Pull Request in the [project](https://github.com/orgs/pyfar/projects/3).