Update CITATION.cff

Author: geopayme

CITATION.cff

@@ -10,7 +10,7 @@ authors:
     affiliation: Kapodistrian Academy of Science
     orcid: https://orcid.org/0000-0002-1825-0097
 license: "Other (Open, Non-Commercial)"
-repository-code: "https://github.com/KapodistrianCrypto/QD-RSA-Challenge"
+repository-code: "https://github.com/Galactic-Code-Developers/QD-RSA-Challenge"
 keywords:
   - quantum cryptography
   - RSA