Improve javadoc for all addons (#15667)

Signed-off-by: Holger Friedrich <mail@holger-friedrich.de>

bundles/org.openhab.binding.neeo/src/main/java/org/openhab/binding/neeo/internal/NeeoHandlerCallback.java

@@ -43,7 +43,7 @@ public interface NeeoHandlerCallback {
      * Callback to the bridge/thing to update the state of a channel in the bridge/thing.
      *
      * @param channelId the non-null, non-empty channel id
-     * @param state the new non-null {@State}
+     * @param state the new non-null {@link State}
      */
     void stateChanged(String channelId, State state);