fix: 修复导出 merge

lib/tallty_import_export/export.rb

@@ -142,11 +142,11 @@ module TalltyImportExport
               if header[:merge].present? && last_row.present? && _data == last_row[col_index]
                 # 这里使用二维数组，每个数组里都是列内容相同的各行
                 merge_column_hash[col_index] ||= []
-                if merge_column_hash[col_index].last&.last == index + first_content_row_index - 1
+                if merge_column_hash[col_index].last&.last == index + first_content_row_index - 1 - 1
                   # 说明内容和上面的是延续的，继续加入之前的数组
-                  merge_column_hash[col_index].last << index + first_content_row_index
+                  merge_column_hash[col_index].last << index + first_content_row_index - 1
                 else
-                  merge_column_hash[col_index] << [index + first_content_row_index - 1, index + first_content_row_index]
+                  merge_column_hash[col_index] << [index + first_content_row_index - 1 - 1, index + first_content_row_index - 1]
                 end
               end
               row.push(_data)