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/bugreport.vim b/runtime/bugreport.vim
index f7886a9..38f47b6 100644
--- a/runtime/bugreport.vim
+++ b/runtime/bugreport.vim
@@ -1,8 +1,9 @@
 :" Use this script to create the file "bugreport.txt", which contains
 :" information about the environment of a possible bug in Vim.
 :"
-:" Maintainer:	Bram Moolenaar <Bram@vim.org>
-:" Last change:	2019 Jan 27
+:" Maintainer:	The Vim Project <https://github.com/vim/vim>
+:" Last change:	2023 Aug 10
+:" Former Maintainer:	Bram Moolenaar <Bram@vim.org>
 :"
 :" To use inside Vim:
 :"	:so $VIMRUNTIME/bugreport.vim