[Java] Add @SuppressWarnings("this-escape") to fix the JDK 21-ea build.

Author: vyazelenko

sbe-tool/src/main/java/uk/co/real_logic/sbe/xml/EncodedDataType.java

@@ -69,6 +69,7 @@ public EncodedDataType(final Node node)
      * @param givenName      for this node.
      * @param referencedName of the type when created from a ref in a composite.
      */
+    @SuppressWarnings("this-escape")
     public EncodedDataType(final Node node, final String givenName, final String referencedName)
     {
         super(node, givenName, referencedName);