devel/viewvc-devel: Update to 1.3.0-20231018

On master (1.3-dev) branch, an important issue #333
(https://github.com/viewvc/viewvc/issues/333) was fixed. The issue
was on forbidden and forbiddenre authorizer which should hide paths
or repositories from users, and it had entirely broken on porting to
Python 3 (no releases is affected).

PR: 274621