Fix typo

Author: asmeurer

cupy-xfails.txt

@@ -45,7 +45,7 @@ array_api_tests/test_statistical_functions.py::test_min
 array_api_tests/test_statistical_functions.py::test_max
 
 # prod() sometimes doesn't give nan for 0*overflow
-array_api_tests/test_statistical_functions::test_prod
+array_api_tests/test_statistical_functions.py::test_prod
 
 # testsuite incorrectly thinks meshgrid doesn't have indexing argument
 # (https://github.com/data-apis/array-api-tests/issues/171)