Fix AI-Caught bug

Author: CodeByDrescher

vcell-core/src/main/java/org/jlibsedml/SedMLReader.java

@@ -827,7 +827,7 @@ private static SId parseId(String id, String filename){
         if (null != id) return new SId(id);
         if (filename == null) return null;
         String alternativeFilename = filename.substring(0, filename.lastIndexOf("."));
-        if (!alternativeFilename.matches("[a-zA-z0-9_]+")) return null;
+        if (!alternativeFilename.matches("[a-zA-Z0-9_]+")) return null;
         return new SId(alternativeFilename);
     }
 }