docs: improve descriptions

Thanks to @qzhuyan for the corrections.

apps/emqx_resource/i18n/emqx_resource_schema_i18n.conf

@@ -127,7 +127,7 @@ When disabled the messages are buffered in RAM only."""
   batch_size {
     desc {
       en: """Maximum batch count. If equal to 1, there's effectively no batching."""
-      zh: """批量请求大小。如果等于1，实际上就没有批处理。"""
+      zh: """批量请求大小。如果设为1，则无批处理。"""
     }
     label {
       en: """Batch size"""