gh-116485: Fixed the typo (#116486)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

Author: varungole

Lib/collections/__init__.py

@@ -680,7 +680,7 @@ def update(self, iterable=None, /, **kwds):
 
         '''
         # The regular dict.update() operation makes no sense here because the
-        # replace behavior results in the some of original untouched counts
+        # replace behavior results in some of the original untouched counts
         # being mixed-in with all of the other counts for a mismash that
         # doesn't have a straight-forward interpretation in most counting
         # contexts.  Instead, we implement straight-addition.  Both the inputs