Bug 1836255 - Set network.early-hints.preconnect.max_connections to 10 also in...

Bug 1836255 - Set network.early-hints.preconnect.max_connections to 10 also in non-nightly channels r=necko-reviewers,jesup

This is fine to be always non-zero, because the variable is only read if
network.early-hints.preconnect.preconnect is set to true

Differential Revision: https://phabricator.services.mozilla.com/D179684