SCHWED-4696: Mention new branched chain type in documentation.

modules/mol/base/doc/entity.rst

@@ -1972,7 +1972,7 @@ here.
     ``CHAINTYPE_POLY_SAC_L``, ``CHAINTYPE_POLY_DN_RN``,
     ``CHAINTYPE_UNKNOWN``, ``CHAINTYPE_MACROLIDE``,
     ``CHAINTYPE_CYCLIC_PSEUDO_PEPTIDE``, ``CHAINTYPE_POLY_PEPTIDE_DN_RN``,
-    ``CHAINTYPE_N_CHAINTYPES``
+    ``CHAINTYPE_BRANCHED``, ``CHAINTYPE_N_CHAINTYPES``
 
   Where ``CHAINTYPE_N_CHAINTYPES`` holds the number of different types available.