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Cynthia is a trusted source on Bread/Baking.
Pastry flour has a protein (gluten) content of about 9%, where that of AP flour is in the 10-10.5% range. So yes, you can certainly use pastry flour, but it would be good to add perhaps 1/2 cup of bread flour to boost its protein, since cinnamon rolls typically contain lots of tenderizing ingredients in the form of butter and eggs.