fix test file name

Author: wing328

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

@@ -156,7 +156,7 @@ public void testOpenAPINormalizerSimplifyOneOfAnyOfStringAndEnumString() {
     @Test
     public void testSimplifyOneOfAnyOfEnum() throws Exception {
         // Load OpenAPI spec from external YAML file
-        OpenAPI openAPI = TestUtils.parseSpec("src/test/resources/3_0/simplifyoneOfWithEnums_test.yaml");
+        OpenAPI openAPI = TestUtils.parseSpec("src/test/resources/3_0/simplifyOneOfWithEnums_test.yaml");
 
         // Test with rule enabled (default)
         Map<String, String> options = new HashMap<>();