getbidipairedbracket.xml: add a note about the ICU compatible version (#3609)

Co-authored-by: Gina Peter Banyard <girgias@php.net>

Author: mmalferov

reference/intl/intlchar/getbidipairedbracket.xml

@@ -64,6 +64,15 @@ string(1) "]"
   </example>
  </refsect1>
 
+ <refsect1 role="notes">
+  &reftitle.notes;
+  <note>
+   <para>
+    This method is available as of ICU version 52.
+   </para>
+  </note>
+ </refsect1>
+
  <refsect1 role="seealso">
   &reftitle.seealso;
   <para>