DOC: fix typo in _add_newdoc_ufunc docstring (numpy#26232)

Author: lpsinger

numpy/_core/_add_newdocs.py

@@ -4743,7 +4743,7 @@
     Notes
     -----
     This method allocates memory for new_docstring on
-    the heap. Technically this creates a mempory leak, since this
+    the heap. Technically this creates a memory leak, since this
     memory will not be reclaimed until the end of the program
     even if the ufunc itself is removed. However this will only
     be a problem if the user is repeatedly creating ufuncs with