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>

Johannes Sixt committed Aug 20, 2025 at 08:16 UTC bcb20dda833dc71a729af50bdfb86c5d252307b1
1 file changed +4 -4
Documentation/gitk.txt
+4 -4
@@ -163,16 +163,16 @@ used by default. If '$XDG_CONFIG_HOME' is not set it defaults to
163
164 History
165 -------
166 -Gitk was the first graphical repository browser. It's written in
167 -tcl/tk.
166 +Gitk was the first graphical repository browser, written by
167 +Paul Mackerras in Tcl/Tk.
168
169 'gitk' is actually maintained as an independent project, but stable
170 versions are distributed as part of the Git suite for the convenience
171 of end users.
172
173 -gitk-git/ comes from Paul Mackerras's gitk project:
173 +`gitk-git/` comes from Johannes Sixt's gitk project:
174
175 - git://ozlabs.org/~paulus/gitk
175 + https://github.com/j6t/gitk
176
177 SEE ALSO
178 --------