Counter doc mentions three methods, but lists four (GH-30706)

Was probably caused by the addition of the `total()` method
diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index b97bc42..c45d90c 100644
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -276,7 +276,7 @@
        according to when an element is first encountered in the left operand
        and then by the order encountered in the right operand.
 
-    Counter objects support three methods beyond those available for all
+    Counter objects support additional methods beyond those available for all
     dictionaries:
 
     .. method:: elements()