Fix broken translations for package documantion

[wxiaoguang]

The code was just copied&pasted, it causes problems now.

There are a lot (for every package) broken translations. eg:

# en-US
conda.documentation = For more information on the Conda registry, see 
<a target="_blank" rel="noopener noreferrer" href="%s">the documentation</a>.

# fr-FR (and many languages)
conda.documentation=Pour plus d'informations sur le registre Conda, voir 
<a target="_blank" rel="noopener noreferrer" href="https://docs.gitea.io/fr-fr/packages/conda/">la documentation</a>.

To resolve the problem fundamentally, use a general string, and trigger the re-translating on Crowdin side.

And, it should really really really avoid introducing too much copied&pasted code .......