update sample

Author: jpfinne

modules/openapi-generator/src/test/java/org/openapitools/codegen/java/spring/SpringCodegenTest.java

@@ -7611,4 +7611,10 @@ void disableDiscriminatorJsonIgnorePropertiesIsTrueThenJsonIgnorePropertiesShoul
         JavaFileAssert.assertThat(files.get("BaseConfiguration.java"))
             .assertTypeAnnotations().containsWithName("JsonIgnoreProperties");
     }
+
+    @Test
+    void issue_23635() throws IOException {
+            final Map<String, File> files = generateFromContract("src/test/resources/3_0/spring/issue_23635.yaml", SPRING_BOOT,
+                    Map.of());
+    }
 }