git-notify: Move the Gitweb URL to the bottom

In commit notifications, specify the Gitweb URL (if any) at the bottom
of the ASCII "table" which summarizes the commit.  That looks better.

tools/git-notify

@@ -328,10 +328,10 @@ sub send_commit_notice($$)
         "Module: $repos_name",
         "Branch: $ref",
         "Commit: $obj",
-        $gitweb_url ? "URL: $gitweb_url/?a=commit;h=$obj" : undef),
         "Author:" . $info{"author"},
         $info{"committer"} ne $info{"author"} ? "Committer:" . $info{"committer"} : undef,
         "Date:" . format_date($info{"author_date"},$info{"author_tz"}),
+        $gitweb_url ? "URL: $gitweb_url/?a=commit;h=$obj" : undef),
         "",
         @{$info{"log"}},
         "",