Update copyright year in CovariantEqualsTest.java

Author: Laurens-W

src/test/java/org/openrewrite/staticanalysis/kotlin/CovariantEqualsTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024 the original author or authors.
+ * Copyright 2025 the original author or authors.
  * <p>
  * Licensed under the Moderne Source Available License (the "License");
  * you may not use this file except in compliance with the License.