Fix a minor typo

Author: warsaw

peps/pep-0782.rst

@@ -54,7 +54,7 @@ strategy is to allocate a short buffer and extend it (to the exact size)
 each time a larger write is needed.
 
 This strategy is inefficient because it requires to enlarge the buffer
-multiple timess. It's more efficient to overallocate the buffer the
+multiple times. It's more efficient to overallocate the buffer the
 first time that a larger write is needed. It reduces the number of
 expensive ``realloc()`` operations which can imply a memory copy.