Param correction (signalwire#34)

Author: Len-PGH

docs/FreeSWITCH-Explained/Modules/mod-opus/FreeSWITCH-And-The-Opus-Audio-Codec_12517398.mdx

@@ -300,10 +300,10 @@ Similarly and intuitively, the other entity involved can set the decoder at a sa
 <param name="asymmetric-sample-rates" value="1"/>
 ```
 
-"negotiate-bitrate", when set to 1, will tell FreeSWITCH to evaluate the remote party's maxaveragebitrate when deciding how to initialize the opus encoder. This is based on FMTP exchange.
+"bitrate-negotiation", when set to 1, will tell FreeSWITCH to evaluate the remote party's maxaveragebitrate when deciding how to initialize the opus encoder. This is based on FMTP exchange.
 
 ```xml
-<param name="negotiate-bitrate" value="1"/>
+<param name="bitrate-negotiation" value="1"/>
 ```
 
 This is available from FreeSWITCH v1.6.12.