fix(editor2): incorrect translation of rear_delay

Author: guansss

src/i18n/translations.json

@@ -330,7 +330,7 @@
             },
             "rear_delay": {
               "cn": "后置延迟",
-              "en": "Rear-Delay"
+              "en": "Post-Delay"
             },
             "post_delay": {
               "cn": "后置延迟",