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/doc/intro.txt b/runtime/doc/intro.txt
index 04d5f5c..7b66303 100644
--- a/runtime/doc/intro.txt
+++ b/runtime/doc/intro.txt
@@ -1,4 +1,4 @@
-*intro.txt*     For Vim version 9.0.  Last change: 2022 Nov 20
+*intro.txt*     For Vim version 9.0.  Last change: 2023 Aug 09
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -129,8 +129,9 @@
 3. Send bug reports to: Vim Developers <vim-dev@vim.org>
    This is a maillist, you need to become a member first and many people will
    see the message.  If you don't want that, e.g. because it is a security
-   issue, send it to <bugs@vim.org>, this only goes to the Vim maintainer
-   (that's Bram).
+   issue, please contact any of the current Vim maintainers
+   https://github.com/orgs/vim/people (but not Bram or the vim-dev ML).
+   In the future, a proper process for handling security issues will be setup.
 
 Please be brief; all the time that is spent on answering mail is subtracted
 from the time that is spent on improving Vim!  Always give a reproducible
@@ -181,9 +182,9 @@
 introduce Y2K problems, but those are not really part of Vim itself.
 
 ==============================================================================
-3. Credits				*credits* *author* *Bram* *Moolenaar*
+3. Credits						*credits* *author*
 
-Most of Vim was created by Bram Moolenaar <Bram@vim.org>.
+Most of Vim was created by Bram Moolenaar <Bram@vim.org> |Bram-Moolenaar|
 
 Parts of the documentation come from several Vi manuals, written by:
 	W.N. Joy
@@ -216,7 +217,7 @@
 	Bill Foster		Athena GUI port (later removed)
 	Google			Lets me work on Vim one day a week
 	Loic Grenie		xvim (ideas for multi windows version)
-	Sven Guckes		Vim promoter and previous WWW page maintainer
+	Sven Guckes		Vim promoter and previous WWW page maintainer |Sven-Guckes|
 	Darren Hiebert		Exuberant ctags
 	Jason Hildebrand	GTK+ 2 port
 	Bruce Hunsaker		improvements for VMS port