Add missing fields to transport descriptor documentation (#1111) (#1113)

* Refs #23592: Add missing field to transport descriptor

Signed-off-by: cferreiragonz <carlosferreira@eprosima.com>

* Refs #23592: Remove unneeded include

Signed-off-by: cferreiragonz <carlosferreira@eprosima.com>

---------

Signed-off-by: cferreiragonz <carlosferreira@eprosima.com>
(cherry picked from commit 76a3e66)

# Conflicts:
#	docs/fastdds/xml_configuration/transports.rst

Co-authored-by: Carlos Ferreira González <carlosferreira@eprosima.com>

Author: mergify[bot]

code/XMLTester.xml

@@ -4035,6 +4035,26 @@
                 <port_queue_capacity>512</port_queue_capacity>
                 <healthy_check_timeout_ms>1000</healthy_check_timeout_ms>
                 <rtps_dump_file>rtsp_messages.log</rtps_dump_file>
+                <default_reception_threads>
+                    <scheduling_policy>-1</scheduling_policy>
+                    <priority>0</priority>
+                    <affinity>0</affinity>
+                    <stack_size>-1</stack_size>
+                </default_reception_threads>
+                <reception_threads>
+                    <reception_thread port="12345">
+                        <scheduling_policy>-1</scheduling_policy>
+                        <priority>0</priority>
+                        <affinity>0</affinity>
+                        <stack_size>-1</stack_size>
+                    </reception_thread>
+                </reception_threads>
+                <dump_thread>
+                    <scheduling_policy>-1</scheduling_policy>
+                    <priority>0</priority>
+                    <affinity>0</affinity>
+                    <stack_size>-1</stack_size>
+                </dump_thread>
             </transport_descriptor>
         </transport_descriptors>
 <!-->