Fix: Replace pipe character (|) with %7C in URLs

Modified the handling of URLs in the file field to replace the pipe character (|) with its encoded representation (%7C) to avoid exceptions
in JabRef.

Closes JabRef#11876

src/main/java/org/jabref/logic/importer/util/FileFieldParser.java

@@ -25,7 +25,8 @@ public FileFieldParser(String value) {
         if (value == null) {
             this.value = null;
         } else {
-            this.value = value.replace("$\\backslash$", "\\");
+            String valueFormat = value.replace("|", "%7C");
+            this.value = valueFormat.replace("$\\backslash$", "\\");
         }
     }