Merge branch '103-add-hifis-cloud-milestones-for-2021-to-roadmap' into 'add-cloud-roadmap-to-other-roadmaps'

Resolve "Add HIFIS Cloud milestones for 2021 to roadmap"

See merge request hifis/hifis.net!158

Adapted Wording in Service Portfolio Milestones, deleted milestone with process manual in 12.2021 that seems to be doubled with the milestone in 11.2021

Helmholtz partners: Open Science Office, Helmholtz Academy

See merge request hifis/hifis.net!173

Bump html-proofer from 3.18.6 to 3.18.8

See merge request hifis/hifis.net!166

Backbone milestones aai fts (redo)

See merge request hifis/hifis.net!172

Publication isgc 2021

See merge request hifis/hifis.net!168

Bumps [html-proofer](https://github.com/gjtorikian/html-proofer) from 3.18.6 to 3.18.8.
- [Release notes](https://github.com/gjtorikian/html-proofer/releases)
- [Commits](https://github.com/gjtorikian/html-proofer/compare/v3.18.6...v3.18.8)

job offer for consultants position

See merge request hifis/hifis.net!164

Add software publications and contributions

See merge request hifis/hifis.net!162

More publications

See merge request hifis/hifis.net!159

# Conflicts:
#   mission/publications.md

Bump html-proofer from 3.18.5 to 3.18.6

See merge request hifis/hifis.net!161

Bumps [html-proofer](https://github.com/gjtorikian/html-proofer) from 3.18.5 to 3.18.6.
- [Release notes](https://github.com/gjtorikian/html-proofer/releases)
- [Commits](https://github.com/gjtorikian/html-proofer/compare/v3.18.5...v3.18.6)

SAB summary

See merge request hifis/hifis.net!160