Fix doc after adding disable_*hs_negs parameters

Summary: See D17337389

Differential Revision: D17571775

fbshipit-source-id: 0b8393358a797ef6bdac4f5c8b060d533c784f8d

Author: lw

docs/source/configuration_file.rst

@@ -165,6 +165,14 @@ See :ref:`negative-sampling` for more details.
 
   The number of negatives uniformly sampled from the currently active partition, per positive edge.
 
+- ``disable_lhs_negs`` (type: boolean; default: ``false``)
+
+  Disable negative sampling on the left-hand side.
+
+- ``disable_rhs_negs`` (type: boolean; default: ``false``)
+
+  Disable negative sampling on the right-hand side.
+
 See :ref:`loss` for more details.
 
 - ``loss_fn`` (type: string, either ``"ranking"``, ``"logistic"`` or ``"softmax"``; default: ``"ranking"``)