[German] UI terms

[remibetin]

Needs update

UI terms file: https://github.com/w3c/wai-website-data/blob/master/translations.yml

• [x] Add de translations for the following English terms:

- en: 'Hide'   # for show/hide toggle, for example, on the WAI home page: “Hide Section”

- en: 'This video is available with more accessibility features:'   # Text under videos such as at w3.org/WAI/test-evaluate/#initial -- with the title of the video after this phrase

# The 3 next phrases are combined with a number to created "to footnote 1" and "back to footnote 1 in text" in https://www.w3.org/WAI/business-case/#fn:1

- en: 'to footnote'

- en: 'back to footnote'

- en: 'in text'

- en: 'Acknowledgements'

- en: 'Standards/Guidelines' # Precedes list of translations of standards and guidelines in this language, in https://www.w3.org/WAI/translations/

[remibetin]

@alexejrotar Would you be interested in translating these additional UI terms?

[D-oro]

@remibetin I'm happy to translate these, before the 31st of March.

[remibetin]

Thank you @D-oro! You can proceed.

[D-oro]

Translation is ready for review. Pull request can be found here: https://github.com/w3c/wai-website-data/pull/138

[remibetin]

Thank you @D-oro! We will publish these UI terms very soon.

[remibetin]

Thanks @D-oro we have published this contribution!