Update apps.json for ProSign v2.4.0

Author: github-actions[bot]

apps.json

@@ -20,6 +20,16 @@
         "https://raw.githubusercontent.com/ProStore-iOS/ProSign/refs/heads/main/gallery/Screenshot5.png"
       ],
       "versions": [
+        {
+          "version": "2.4.0",
+          "date": "2025-10-12T05:46:40+0000",
+          "localizedDescription": "What's new in Version 2.4.0?\n- Replace status box with progress bar and update to v2.3.0\n- Enhance SignerView with progress and error states",
+          "downloadURL": "https://github.com/ProStore-iOS/ProSign/releases/download/v2.4.0/com.prostoreios.prosign-unsigned-ios.ipa",
+          "size": 3734031,
+          "sha256": "b7a6eec22bdc07f917da46ec767a857be49132f968c90ea8e407a3af0a075bd8",
+          "minOSVersion": "16.0",
+          "fullDate": "20251012054640"
+        },
         {
           "version": "2.3.0",
           "date": "2025-10-12T05:34:03+0000",