Update plugins.trac templates.

Similar to https://make.wordpress.org/systems/2023/02/06/update-plugins-trac-templates/ can we please have svnup-meta-checkouts.sh run on svn2?

Could we also consider adding it to a cron task that runs daily on svn2? (svn1 does not need this)

On svn1 it runs whenever a change to the paths it checks out is modified.

#trac #svn #prio3