Update dev_4_4 submodules

Repository: openmicroscopy/openmicroscopy
Already up-to-date.

Repository: openmicroscopy/bioformats
Updating 24852fd..c4269c7
Merged PRs (fast-forward):
  # PR 695 sbesson 'Downloads page: use PDF artifact (rebased onto dev_4_4)'

Repository: ome/scripts
Already up-to-date.

Repository: openmicroscopy/ome-documentation
Already up-to-date.

Generated by OMERO-submods-stable#173 (http://hudson.openmicroscopy.org.uk/job/OMERO-submods-stable/173/)