8341541: Wrong anchor in wrapper classes links

Reviewed-by: hannesw, liach

src/java.base/share/classes/java/lang/package-info.java

@@ -29,8 +29,8 @@
  * Object}, which is the root of the class hierarchy, and {@link
  * Class}, instances of which represent classes at run time.
  *
- * <p>Frequently it is necessary to represent a value of primitive
- * type as if it were an object.The <dfn id=wrapperClasses>{@index
+ * <p id=wrapperClass>Frequently it is necessary to represent a
+ * value of primitive type as if it were an object.The <dfn>{@index
  * "wrapper classes"}</dfn> {@link Boolean}, {@link Byte}, {@link
  * Character}, {@link Short}, {@link Integer}, {@link Long}, {@link
  * Float}, and {@link Double} serve this purpose.  An object of type

src/java.compiler/share/classes/javax/lang/model/util/Types.java

@@ -206,7 +206,7 @@ public interface Types {
      *
      * @throws IllegalArgumentException if the given type has no
      *         unboxing conversion. Only types for the {@linkplain
-     *         java.lang##wrapperClasses wrapper classes} have an
+     *         java.lang##wrapperClass wrapper classes} have an
      *         unboxing conversion.
      * @jls 5.1.8 Unboxing Conversion
      */