Follow reviewer's suggestion

Co-authored-by: Felicia Lim <flim@google.com>

index.bs

@@ -3083,7 +3083,7 @@ An IA multiplexer may merge two [=IA Sequence=]s (or two [=Audio Element=]s). In
 This section provides a way to generate an [=IA Sequence=] with two [=Audio Element=]s from two [[#profiles-simple|Simple Profile]] [=IA Sequence=]s with the same [=Codec Config OBU=]. The result complies with the [[#profiles-base|Base Profile]].
 
 Step 1: [=Descriptors=] are generated as follows:
-- [=IA Sequence Header OBU=]: Both [=primary_profile=] and [=additional_profile=] fields are set to 1 to indicate [[#profiles-base|Base Profile]].
+- [=IA Sequence Header OBU=]: Both [=primary_profile=] and [=additional_profile=] fields are set to 1 to indicate the [[#profiles-base|Base Profile]].
 - [=Codec Config OBU=]: take the [=Codec Config OBU=] from either of the input [=IA Sequence=]s.
 - Two [=Audio Element OBU=]s: take both [=Audio Element OBU=]s from both the input [=IA Sequence=]s and make the following modifications as needed:
 	- The [=audio_element_obu/codec_config_id=]s in both [=Audio Element OBU=] are updated to indicate the [=codec_config_obu/codec_config_id=] specified in the taken [=Codec Config OBU=].