Fix Javadoc

This commit fixes various Javadoc issues across the code base.

See gh-32403

spring-core/src/test/java/org/springframework/core/annotation/NestedRepeatableAnnotationsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -39,7 +39,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Sam Brannen
  * @since 5.3.24
- * @see https://github.com/spring-projects/spring-framework/issues/20279
+ * @see <a href="https://github.com/spring-projects/spring-framework/issues/20279">gh-20279</a>
  */
 @SuppressWarnings("unused")
 class NestedRepeatableAnnotationsTests {