Update README.md.

Author: gk-brown

README.md

@@ -517,7 +517,7 @@ System.out.println(text); // Hello, World!
 ```
 
 ## CSVEncoder
-The `CSVEncoder` class serializes a sequence of map or bean values to CSV. The list passed to the constructor represents both the names of the columns in the output document and the keys or properties to which those columns correspond. For example:
+The `CSVEncoder` class serializes a sequence of map, bean, or record values to CSV. The list passed to the constructor represents both the names of the columns in the output document and the keys or properties to which those columns correspond. For example:
 
 ```java
 var rows = listOf(

kilo-client/src/test/java/org/httprpc/kilo/io/CSVEncoderTest.java

@@ -57,6 +57,13 @@ public boolean isC() {
         }
     }
 
+    public record Record(
+        String a,
+        int b,
+        boolean c
+    ) {
+    }
+
     @Test
     public void testMaps() throws IOException {
         var rows = listOf(
@@ -109,6 +116,26 @@ public void testBeans() throws IOException {
         assertEquals(expected, writer.toString());
     }
 
+    @Test
+    public void testRecords() throws IOException {
+        var rows = listOf(
+            new Record("hello", 123, true),
+            new Record("goodbye", 456, false)
+        );
+
+        var csvEncoder = new CSVEncoder(listOf("a", "b", "c"));
+
+        var writer = new StringWriter();
+
+        csvEncoder.write(rows, writer);
+
+        var expected = "\"a\",\"b\",\"c\"\r\n"
+            + "\"hello\",123,true\r\n"
+            + "\"goodbye\",456,false\r\n";
+
+        assertEquals(expected, writer.toString());
+    }
+
     @Test
     public void testFormats() throws IOException {
         var number = 1000.0;