修复HttpUtil.urlWithFormUrlEncoded方法重复编码问题

hutool-http/src/test/java/org/dromara/hutool/http/Issue3536Test.java

@@ -0,0 +1,23 @@
+package org.dromara.hutool.http;
+
+import org.dromara.hutool.core.util.CharsetUtil;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class Issue3536Test {
+
+	@Test
+	public void urlWithFormUrlEncodedTest() {
+		final String url = "https://hutool.cn/test";
+		final Map<String, Object> paramMap = new HashMap<>();
+		paramMap.put("redirect_uri", "https://api.hutool.cn/v1/test");
+		paramMap.put("scope", "a,b,c你");
+
+		final String s = HttpUtil.urlWithFormUrlEncoded(url, paramMap, CharsetUtil.UTF_8);
+		Assert.assertEquals("https://hutool.cn/test?scope=a,b,c%E4%BD%A0&redirect_uri=https://api.hutool.cn/v1/test", s);
+	}
+
+}