Doc: Add BOLD titles

documentations/en/pages/acknowledgements.md

documentations/en/pages/afroscreen.md

documentations/en/pages/contributions.md

documentations/en/pages/features.md

documentations/en/pages/glossary.md

documentations/en/pages/results.md

documentations/en/pages/usage.md

documentations/fr/pages/acknowledgements.md

documentations/fr/pages/afroscreen.md

documentations/fr/pages/contributions.md

documentations/fr/pages/features.md

documentations/fr/pages/glossary.md

documentations/fr/pages/results.md