* Makefile (QT_PATCH): Bump up to 2.
(QT_TARBALL_CHECKSUM): Update to Qt 6.2.2 release tarball's sha256sum.
* docker/Dockerfile_ubuntu_18.04: Move the nodejs installation earlier
in the Dockerfile, as it needs to already be installed by the time we
want to install libqt-jami's build dependencies.
* packaging/rules/debian-qt/control (libqt-jami) <Build-Depends>: Add
missing nodejs (>= 10.19) dependency.

jami-packaging#111
Change-Id: Ie15a1f4c7cfb274dc6a1784ce41f5b7383002abe