Update syslog-ng.conf for Ubuntu 22.04

[burgerrg]

Description of the change

Updates the syslog-ng configuration file format from 3.25 to 3.35 for the version of syslog-ng installed in Ubuntu 22.04

Benefits

Quiets the warning when phusion/baseimage:jammy-1.0.0 boots:

WARNING: Configuration file format is too old, syslog-ng is running in compatibility mode. Please update it to use the syslog-ng 3.35 format at your time of convenience. To upgrade the configuration, please review the warnings about incompatible changes printed by syslog-ng, and once completed change the @version header at the top of the configuration file; config-version='3.25'
WARNING: The internal_queue_length stat counter has been renamed to internal_source.queued. The old name will be removed in future versions; config-version='3.25'

Possible drawbacks

I did not investigate whether other changes are necessary to the configuration file.

[samip5]

Seems good to me, will need some testing before a release though.

[cairoapcampos]

I will wait for this solution. Thank you very much.