fixed failing tests.

a class used in the tests was converted to records. The problem: It was used in a set and the equals/hashCode implementation of record made all instances the same.

Author: schauder

spring-data-relational/src/test/java/org/springframework/data/relational/core/conversion/RelationalEntityWriterUnitTests.java

@@ -911,7 +911,12 @@ public ListContainer(Long id) {
 		}
 	}
 
-	private record Element(@Id Long id) {
+	private static class Element {
+		@Id final Long id;
+
+		public Element(Long id) {
+			this.id = id;
+		}
 	}
 
 	private record ElementReference(Element element) {