download endpoints include version numbers, preventing automated updates

[jhpoelen]

Download links in virjendb include version numbers:

e.g.,

https://virjendb.uni-jena.de:8000/api/vj.v0.1_bacteriophages.csv.gz

Suggest to include a download link that points to the current version of the resource. This would help make it easier for GloBI to automatically index the most recent version of the resource.

suggested name:

https://virjendb.uni-jena.de:8000/api/vj.current_bacteriophages.csv.gz

or

https://virjendb.uni-jena.de:8000/api/vj.bacteriophages.csv.gz

fyi @Daniel-Mietchen related to globalbioticinteractions/globalbioticinteractions#971