Missing @since tags

Change-Id: Ic19041193264627baefd487ddd1d3c05088c027e

offapi/com/sun/star/xml/crypto/DigestID.idl

@@ -50,11 +50,15 @@ constants DigestID
     const long SHA256_1K = 4;
 
     /** identifier of SHA-512 algorithm
+
+        @since LibreOffice 6.0
      */
     const long SHA512 = 5;
 
     /** identifier of SHA-512 algorithm that is applied to the first
         kilobyte of data.
+
+        @since LibreOffice 6.0
      */
     const long SHA512_1K = 6;
 };