add key to task config

Former-commit-id: d8f6d5cab8b43eeff2387350d0eabb4c89564342

configs/task_config.yaml

@@ -1,6 +1,10 @@
 # configuration for each task
 model: "gpt-4"
-local_dump: ./local_dump
-output_type: srt
-target_lang: CN
-field: SC2
+# output type that user receive
+output_type: 
+  subtitle: "srt"
+  video: False
+  bilingal: False
+source_lang: "EN"
+target_lang: "CN"
+field: "SC2"