another string change for windows

ogzaf/macro_params.py

@@ -33,7 +33,7 @@ def get_macro_params(
     # initialize a dictionary of parameters
     macro_parameters = {}
     # baseline date formatted for World Bank data
-    baseline_YYYYQ = data_end_date.strftime("%YQ%q")
+    baseline_YYYYQ = data_end_date.strftime(r"%YQ%q")
 
     """
     Retrieve data from the World Bank World Development Indicators.