Update Doc/c-api/unicode.rst

Co-authored-by: Stan Ulbrych <[email protected]>

Author: rruuaanng

Doc/c-api/unicode.rst

@@ -671,7 +671,7 @@ APIs:
    Resize a Unicode object. The length is the number of codepoints.
 
    Try to resize the string in place (which is usually faster than allocating
-   a new string and copy characters), or create a new string.
+   a new string and copying characters), or create a new string.
 
    ``*unicode`` is modified to point to the new (resized) object and 0 is
    returned on success. Otherwise, ``-1`` is returned and an exception is set,