Farewell to Bram and dedicate upcoming Vim 9.1 to him (#12749)

* Dedicate upcoming Vim 9.1 to Bram

Also replace in a few more places Brams email address and mention new
maintainers.

* Remove Bram from any Maintainer role

* runtime: Align Header

* it's mailing list not mailinglist
diff --git a/runtime/autoload/spellfile.vim b/runtime/autoload/spellfile.vim
index 6f9b1e0..43f7dff 100644
--- a/runtime/autoload/spellfile.vim
+++ b/runtime/autoload/spellfile.vim
@@ -1,6 +1,7 @@
 " Vim script to download a missing spell file
-" Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2020 Jul 10
+" Maintainer:	The Vim Project <https://github.com/vim/vim>
+" Last Change:	2023 Aug 10
+" Former Maintainer:	Bram Moolenaar <Bram@vim.org>
 
 if !exists('g:spellfile_URL')
   " Always use https:// because it's secure.  The certificate is for nluug.nl,