修复CI问题

Author: chengyouling

sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/classloader/ClassLoaderManager.java

@@ -104,6 +104,7 @@ public static ClassLoader getContextClassLoaderOrUserClassLoader() {
         if (classLoader != null) {
             return classLoader;
         }
+        
         // In some Tomcat scenarios, sermant cannot obtain the class loader of the current thread.
         // In this case, the host class loader is used to load classes.
         return userClassLoader;