Update apps.json from ProStore v1.3.1

Author: github-actions[bot]

apps.json

@@ -25,6 +25,16 @@
         "https://raw.githubusercontent.com/ProStore-iOS/ProStore/refs/heads/main/gallery/Screenshot5.png"
       ],
       "versions": [
+        {
+          "version": "1.3.1",
+          "date": "2025-09-15T22:25:48+0000",
+          "localizedDescription": "What's new in Version 1.3.1?\n- Revert AboutView's UI changes and fix some bugs",
+          "downloadURL": "https://github.com/ProStore-iOS/ProStore/releases/download/v1.3.1/com.prostoreios.prostore-unsigned-ios.ipa",
+          "size": 3494653,
+          "sha256": "4c7025020011fa793cd38bfdf2e4998f17fb38d2fb7a17eeb90b639c6e689a4f",
+          "minOSVersion": "16.0",
+          "fullDate": "20250915222548"
+        },
         {
           "version": "1.3.0",
           "date": "2025-09-15T22:13:14+0000",