Make Readme and License files to match

LICENSE.txt

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2009- Spyder Project Contributors and others (see AUTHORS.txt); the spyder/images dir and some source files under other terms (see NOTICE.txt)
+Copyright (c) 2009- Spyder Project Contributors and others (see AUTHORS.txt); some source files and icons may be under other authorship/licenses (see NOTICE.txt)
 
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation

README.md

@@ -1,7 +1,6 @@
 ![Spyder — The Scientific Python Development Environment](https://raw.githubusercontent.com/spyder-ide/spyder/master/branding/logo/spyder_readme_banner.png)
 
-*Copyright © 2009–2023 [Spyder Project Contributors](
-https://github.com/spyder-ide/spyder/graphs/contributors)*
+*Copyright © 2009– [Spyder Project Contributors](https://github.com/spyder-ide/spyder/graphs/contributors)* and others (see AUTHORS.txt)
 
 *Some source files and icons may be under other authorship/licenses; see
 [NOTICE.txt](https://github.com/spyder-ide/spyder/blob/master/NOTICE.txt).*