Update develop submodules

Repository: openmicroscopy/openmicroscopy
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Repository: openmicroscopy/bioformats
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Repository: openmicroscopy/ome-documentation
Updating 8435d81..81befaf
Merged PRs (fast-forward):
  # PR 699 sbesson 'Contributing: CI restructuring'
  # PR 700 joshmoore 'Fix Windows paths error found by Javier Colmeiro (rebased onto develop)'

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