Correct title case

Author: chengweih001

index.bs

@@ -5636,7 +5636,7 @@ A [=local end=] could simulate removing a GATT service by sending the following
 </pre>
 </div>
 
-#### The bluetooth.SimulateCharacteristic Command #### {#bluetooth-simulatecharacteristic-command}
+#### The bluetooth.simulateCharacteristic Command #### {#bluetooth-simulatecharacteristic-command}
 
 <pre highlight="cddl" class="cddl remote-cddl local-cddl">
 bluetooth.SimulateCharacteristic = (
@@ -5742,7 +5742,7 @@ for a characteristic read operation by sending the following message:
 </pre>
 </div>
 
-#### The bluetooth.SimulateDescriptor Command #### {#bluetooth-simulatedescriptor-command}
+#### The bluetooth.simulateDescriptor Command #### {#bluetooth-simulatedescriptor-command}
 
 <pre highlight="cddl" class="cddl remote-cddl local-cddl">
 bluetooth.SimulateDescriptor = (