Add menu entry for taskforces page
We have a nice page describing the taskforces on our website at https://ospo-alliance.org/taskforces/
But we forgot (?) to add a menu entry pointing to this directly, which makes it not visible. For now the only way to access it is through Contribute > Contributing > Taskforces.
We need to add a new menu entry to let people know easily about this page (in the "Contribute" menu?)