Update the copyright symbols in README.rst (GH-25514)

Updated a couple copyright symbols from (c) to ©

The rest of the doc are already using ©

Co-authored-by: Mariatta Wijaya <[email protected]>

Author: mishmanners

README.rst

@@ -14,7 +14,7 @@ This is Python version 3.11.0 alpha 5
    :target: https://discuss.python.org/
 
 
-Copyright (c) 2001-2022 Python Software Foundation.  All rights reserved.
+Copyright © 2001-2021 Python Software Foundation.  All rights reserved.
 
 See the end of this file for further copyright and license information.
 
@@ -243,14 +243,15 @@ See :pep:`664` for Python 3.11 release details.
 Copyright and License Information
 ---------------------------------
 
-Copyright (c) 2001-2022 Python Software Foundation.  All rights reserved.
 
-Copyright (c) 2000 BeOpen.com.  All rights reserved.
+Copyright © 2001-2021 Python Software Foundation.  All rights reserved.
 
-Copyright (c) 1995-2001 Corporation for National Research Initiatives.  All
+Copyright © 2000 BeOpen.com.  All rights reserved.
+
+Copyright © 1995-2001 Corporation for National Research Initiatives.  All
 rights reserved.
 
-Copyright (c) 1991-1995 Stichting Mathematisch Centrum.  All rights reserved.
+Copyright © 1991-1995 Stichting Mathematisch Centrum.  All rights reserved.
 
 See the `LICENSE <https://github.com/python/cpython/blob/main/LICENSE>`_ for
 information on the history of this software, terms & conditions for usage, and a