[3.9] Update copyright year in README (GH-100863) (GH-100865) (GH-100866)

(cherry picked from commit 30a6cc4)

Co-authored-by: Ned Deily <nad@python.org>
Co-authored-by: HARSHA VARDHAN <75431678+Thunder-007@users.noreply.github.com>

Author: 3 people

README.rst

@@ -251,14 +251,14 @@ See :pep:`596` for Python 3.9 release details.
 Copyright and License Information
 ---------------------------------
 
-Copyright (c) 2001-2022 Python Software Foundation.  All rights reserved.
+Copyright © 2001-2023 Python Software Foundation.  All rights reserved.
 
-Copyright (c) 2000 BeOpen.com.  All rights reserved.
+Copyright © 2000 BeOpen.com.  All rights reserved.
 
-Copyright (c) 1995-2001 Corporation for National Research Initiatives.  All
+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 file "LICENSE" for information on the history of this software, terms &
 conditions for usage, and a DISCLAIMER OF ALL WARRANTIES.