Update viperin.md

Fix issue #296 (closed) Important notes:

• There is a mention of Figure 1. But the figure is not included in the text.
• There is one reference (5) that I could not figure out which paper it referred to. I left it as (5), help?

content/3.defense-systems/viperin.md

@@ -12,7 +12,7 @@ tableColumns:
     PFAM: PF04055, PF13353
 contributors:
     - Marian Dominguez-Mirazo
-relevantAbstracts
+relevantAbstracts:
     - doi: 10.1038/s41586-020-2762-2
 ---