fix(l10n): fix plural forms in source language

[nilsding]

en is used as the fallback/default language for when no specific translation is available.

Newer strings that require a plural form would end up with the source text, which could show up as e.g. "1 minute(s) ago" in the GUI.

The translations file for en used to be updated via the Transifex bot until February 2020.

[mgallien]

should we not modify behavior of the script handling the transifex update mechanism
see https://github.com/nextcloud/docker-ci/blob/master/translations-desktop/handleDesktopTranslations.sh#L66-L72

[mgallien]

should we not modify behavior of the script handling the transifex update mechanism see https://github.com/nextcloud/docker-ci/blob/master/translations-desktop/handleDesktopTranslations.sh#L66-L72

in addition the original version of the transifex sync script was this nextcloud/docker-ci@6c2884c
when it was changed client_en.ts stopped being updated
my best guess is that this change is the issue
nextcloud/docker-ci@a89bd22#diff-f9f49f14bdb368726492f713becb203c3cfdb46b509f9c9918a5c3c54b0f75edR44-R45

[nilsding]

created a new attempt at automatically updating the client_en.ts file at nextcloud/docker-ci#770 that should be similar to what it used to be

still, the plural forms of new strings need to be added by us to that file. AFAIK it's not that easy to change these in Transifex for the source language (besides, the source translation file doesn't get pulled from Transifex during that update)

[github-actions]

Artifact containing the AppImage: nextcloud-appimage-pr-8272.zip

SHA256 checksum: c209226b6b6866172a2bdce892584e02dd9022f9e57795bb8f47a219488efa78

To test this change/fix you can download the above artifact file, unzip it, and run it.

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