Update previous_hackathons.yml

Author: DCGenomics

_data/previous_hackathons.yml

@@ -1,3 +1,18 @@
+- date: "November 8-12, 2021"
+  loc: "EU Biohackathon (Hybrid)"
+  link: https://biohackathon-europe.org/projects.html 
+  community access:
+
+- date: "October 1-December 1, 2021"
+  loc: "dknet Type 1 Diabetes Challenge"
+  link: https://info.thesugarscience.org/dknet-21-d-challenge
+  community access:
+
+- date: "October 10-13, 2021"
+  loc: "SV/Pangenomes III (Hybrid) -- Baylor College of Medicine"
+  link: https://www.hgsc.bcm.edu/events/hackathon
+  community access: 
+
 - date: "June 25 - July 30, 2021"
   loc: "Hack4Rare -- Childrens Tumor Foundation (Virtual)"
   link: https://www.synapse.org/#!Synapse:syn25551331/wiki/609587