update link

data/use_cases.json

@@ -61,7 +61,7 @@
                 "title": "Blog posts on threat intelligence",
                 "date": "(September 2018)",
                 "description": "These blog posts explain the fundamentals of how to use ATT&CK for threat intelligence.",
-                "url": "https://medium.com/mitre-attack/using-att-ck-to-advance-cyber-threat-intelligence-part-2-6f21fdba80c"
+                "url": "https://medium.com/mitre-attack/using-att-ck-to-advance-cyber-threat-intelligence-part-1-c5ad14d59724"
             },
             {
                 "title": "ATT&CKing the Status Quo Presentation",