doc/gitk: update reference to the external project

Gitk is now maintained by Johannes Sixt and the repository can be
cloned from a new URL. b59358100c20 (Update the official repo of
gitk, 2024-12-24) could have updated this instance in the manual,
too, but the opportunity was missed. Update it now. Do give credit
to Paul Mackerras as the inventor of the program.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/gitk.txt b/Documentation/gitk.txt
index 35b39960296b69531fff972b6f55c39ed066a655..d90396904eecda3cd6d5c1d37bdd487bb0ea3dd7 100644 (file)
--- a/Documentation/gitk.txt
+++ b/Documentation/gitk.txt
@@ -163,16 +163,16 @@ used by default. If '$XDG_CONFIG_HOME' is not set it defaults to
 
 History
 -------
-Gitk was the first graphical repository browser. It's written in
-tcl/tk.
+Gitk was the first graphical repository browser, written by
+Paul Mackerras in Tcl/Tk.
 
 'gitk' is actually maintained as an independent project, but stable
 versions are distributed as part of the Git suite for the convenience
 of end users.
 
-gitk-git/ comes from Paul Mackerras's gitk project:
+`gitk-git/` comes from Johannes Sixt's gitk project:
 
-       git://ozlabs.org/~paulus/gitk
+       https://github.com/j6t/gitk
 
 SEE ALSO
 --------