Update NOTICE.md

NOTICE.md

@@ -6,7 +6,7 @@ This Citation Notice is part of the RadioHDL software suite.
 Parties that use ASTRON Software resulting in papers and/or publications are requested to
 refer to the DOI(s) that correspond(s) to the version(s) of the ASTRON Software used:
 
-<List of DOIs>
+10.5281/zenodo.3631361
 
 Parties that use ASTRON Software for purposes that do not result in publications (e.g.
 commercial parties) are asked to inform ASTRON about their use of ASTRON Software, by