make it experimental.

Author: arturobernalg

httpcore5-h2/src/main/java/org/apache/hc/core5/http2/priority/PriorityParser.java

@@ -28,11 +28,13 @@
 
 import java.util.Locale;
 
+import org.apache.hc.core5.annotation.Internal;
 import org.apache.hc.core5.http.Header;
 import org.apache.hc.core5.http.message.MessageSupport;
 import org.apache.hc.core5.http.message.ParserCursor;
 import org.apache.hc.core5.util.Tokenizer;
 
+@Internal
 public final class PriorityParser {
 
     private static final Tokenizer TK = Tokenizer.INSTANCE;

httpcore5-h2/src/main/java/org/apache/hc/core5/http2/protocol/H2RequestPriority.java

@@ -29,6 +29,7 @@
 import java.io.IOException;
 
 import org.apache.hc.core5.annotation.Contract;
+import org.apache.hc.core5.annotation.Experimental;
 import org.apache.hc.core5.annotation.ThreadingBehavior;
 import org.apache.hc.core5.http.EntityDetails;
 import org.apache.hc.core5.http.Header;
@@ -56,6 +57,7 @@
  *
  * @since 5.4
  */
+@Experimental
 @Contract(threading = ThreadingBehavior.IMMUTABLE)
 public final class H2RequestPriority implements HttpRequestInterceptor {