curtain module qs: add missing translation

Travel time translation was supplied for the initial config, but not for options.

PR #169

custom_components/tuya_local/translations/en.json

@@ -292,6 +292,7 @@
                     "number_interrupt_frames": "Include interrupt frames as a number entity",
                     "number_maintain_points": "Include maintain points as a number entity",
                     "number_maintain_power": "Include maintain power as a number entity",
+                    "number_travel_time_configuration": "Include travel time configuration as a number entity",
                     "number_trigger_frames": "Include trigger frames as a number entity",
                     "number_trigger_points": "Include trigger points as a number entity",
                     "number_trigger_power": "Include trigger power as a number entity",