Add Javadoc since to JettyClientTags.host() (#2572)

See gh-2054

micrometer-core/src/main/java/io/micrometer/core/instrument/binder/jetty/JettyClientTags.java

@@ -66,11 +66,11 @@ public static Tag method(Request request) {
  }
 
  /**
- * Creates a {@code host} tag based on the {@link Request#getHost()
- * method} of the given {@code request}.
+ * Creates a {@code host} tag based on the {@link Request#getHost()} of the given {@code request}.
  *
  * @param request the request
- * @return the host tag derived from request result.
+ * @return the host tag derived from request
+ * @since 1.7.0
  */
  public static Tag host(Request request) {
  return (request != null) ? Tag.of("host", request.getHost()) : HOST_UNKNOWN;