docs: fix simple typo, sequenc -> sequence (EntilZha#152)

* docs: fix simple typo, sequenc -> sequence

There is a small typo in functional/pipeline.py.

Should read `sequence` rather than `sequenc`.

* Update pipeline.py

functional/pipeline.py

@@ -1387,7 +1387,7 @@ def list(self, n=None):
         >>> seq([1, 2, 3]).list()
         [1, 2, 3]
 
-        :param n: Take n elements of sequenc eif not None
+        :param n: Take n elements of sequence if not None
         :return: list of elements in sequence
         """
         return self.to_list(n=n)