docs: Correct ChangeLog URL to history log.

Debian is using this to make URL with tagged release, and with the old
URL it does return an empty page.

$ apt info util-linux | grep -i version
Version: 2.35.1-2

$ zcat /usr/share/doc/util-linux/changelog.gz
See version control history.

http://git.kernel.org/?p=utils/util-linux/util-linux.git;a=log;h=2.35.1

^^ empty page

Signed-off-by: Anatoly Pugachev <matorola@gmail.com>

ChangeLog

@@ -1,3 +1,3 @@
 See version control history.
 
-http://git.kernel.org/?p=utils/util-linux/util-linux.git;a=log
+https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/log