Add flight intra radio channel to mission briefing (#1475)

resources/briefing/templates/briefingtemplate_CN.j2

@@ -67,6 +67,7 @@ DCS Liberation 第 {{ game.turn }} 回合
 {% for flight in flights if flight.client_units %}
 --------------------------------------------------
 {{ flight.flight_type }} {{ flight.units[0].type }} x {{flight.size}}, departing in {{ flight.departure_delay }}, {{ flight.package.target.name}}
+频率 : {{ intra_flight_channel(flight) }}
 {% for waypoint in flight.waypoints %}
 {{ loop.index0 }} {{waypoint|waypoint_timing("Depart ")}}-- {{waypoint.name}} : {{ waypoint.description}}
 {% endfor %}

resources/briefing/templates/briefingtemplate_EN.j2

@@ -67,6 +67,7 @@ Your flights:
 {% for flight in flights if flight.client_units %}
 --------------------------------------------------
 {{ flight.flight_type }} {{ flight.units[0].type }} x {{ flight.size }}, departing in {{ flight.departure_delay }}, {{ flight.package.target.name}}
+Freq : {{ intra_flight_channel(flight) }}
 {% for waypoint in flight.waypoints %}
 {{ loop.index0 }} {{waypoint|waypoint_timing("Depart ")}}-- {{waypoint.name}} : {{ waypoint.description}}
 {% endfor %}

resources/briefing/templates/briefingtemplate_FR.j2

@@ -67,6 +67,7 @@ Vols :
 {% for flight in flights if flight.client_units %}
 --------------------------------------------------
 {{ flight.flight_type }} {{ flight.units[0].type }} x {{flight.size}}, départ dans {{ flight.departure_delay }}, {{ flight.package.target.name}}
+Fréq : {{ intra_flight_channel(flight) }}
 {% for waypoint in flight.waypoints %}
 {{ loop.index0 }} {{waypoint|waypoint_timing("Départ dans ")}}-- {{waypoint.name}} : {{ waypoint.description}}
 {% endfor %}