Update download URL for version 3.1.3

Author: StephenDev0

index.json

@@ -34,7 +34,7 @@
           "version": "3.1.3",
           "date": "2026-05-18",
           "localizedDescription": "Includes performance improvements, bug fixes, quality of life improvements, a new news tab, and more.",
-          "downloadURL": "https://github.com/StephenDev0/StikDebug/releases/download/3.1.2/StikDebug-3.1.2.ipa",
+          "downloadURL": "https://github.com/StephenDev0/StikDebug/releases/download/3.1.3/StikDebug-3.1.3.ipa",
           "size": 11125407,
           "minOSVersion": "17.4"
         },