Fix typo

Author: aimileus

src/sage/rings/polynomial/polynomial_quotient_ring.py

@@ -1270,7 +1270,7 @@ def random_element(self, degree=None, *args, **kwds):
           degree, or a tuple of the minimum and maximum degree. By default the
           degree is n - 1 with n the degree of the polynomial ring. Note that
           the degree of the polynomial is fixed before the modulo calculation.
-          So when `degree` is bigger then the degree of the polynomial ring, the
+          So when `degree` is bigger than the degree of the polynomial ring, the
           degree of the returned polynomial would be lower than `degree`.
         - ``*args``, ``**kwds`` - Arguments for randomization that are passed
           on to the ``random_element`` method of the polynomial ring, and from