update to newest available version of Pipeline 2: 1.14.4
update to newest available version of Pipeline 2: 1.14.4

modules-parent 1.14.3 breaks the build for some reason,
and modules-parent 1.14.2 has made some changes to
x:epub3-compare-package-doc that makes a couple of
tests fail, so let's keep modules-parent at 1.14.1 for now

mtmse/nordic-epub3-dtbook-migrator,nlbdev/nordic-epub3-dtbook-migrator,mtmse/nordic-epub3-dtbook-migrator,mtmse/nordic-epub3-dtbook-migrator,nlbdev/nordic-epub3-dtbook-migrator,nlbdev/nordic-epub3-dtbook-migrator,nlbdev/nordic-epub3-dtbook-migrator,mtmse/nordic-epub3-dtbook-migrator