update config.json

Author: tsh-hashimoto

build-config.json

@@ -1,5 +1,5 @@
 {
-    "opensource_COBOL_4J_version": "1.1.13",
+    "opensource_COBOL_4J_version": "1.1.14",
     "Open_COBOL_ESQL_4J_version": "1.1.2",
-    "version_string_prefix": "20250929"
+    "version_string_prefix": "20251031"
 }