Missing hyperlinks to UniProtKB_VAR in PRO entry pages

[nataled]

Describe the issue Follow-up from #148. The entry pages fail to have the VAR_ hyperlinked

To Reproduce

1. Go to https://proconsortium.org/app/entry/PR%3A000000328/
2. Scroll down to 'Related Cross References'
3. The text 'UniProtKB_VAR:VAR_006204' is not hyperlinked.

Expected behavior UniProtKB_VAR:VAR_006204 should be linked to https://web.expasy.org/variant_pages/VAR_006204.html

Browser Firefox, Edge

@hongzhanhuang

[Julie-Cowart]

Fixed on test site. See https://proconsortium.org/app_test/entry/PR%3A000000328/

[Julie-Cowart]

in production