add link to preprint

frozen/sgzt-ad12.md

@@ -11,7 +11,7 @@ Valentina Galata, Susheel Bhanu Busi, Benoit Josef Kunath, Laura de Nies, Magdal
 
 {% rgridblock a-unique-id %}
 {% rblock  Manuscript %}
-The manuscript of the paper is available <a href="[missing link]">here</a>.
+A preprint of the manuscript is available at <a href="https://www.biorxiv.org/content/10.1101/2021.04.22.440869v1">here</a>.
 {% endrblock %}