Spec: Adds in missing ChangeLog Field IDs - Reassigns Row Lineage Fie…

…ld IDs(apache#12100)

format/spec.md

@@ -337,8 +337,11 @@ The set of metadata columns is:
 | **`2147483546  file_path`**      | `string`      | Path of a file, used in position-based delete files                                                    |
 | **`2147483545  pos`**            | `long`        | Ordinal position of a row, used in position-based delete files                                         |
 | **`2147483544  row`**            | `struct<...>` | Deleted row values, used in position-based delete files                                                |
-| **`2147483543  _row_id`**        | `long`        | A unique long assigned when row-lineage is enabled, see [Row Lineage](#row-lineage)                    |
-| **`2147483542  _last_updated_sequence_number`**   | `long`        | The sequence number which last updated this row when row-lineage is enabled [Row Lineage](#row-lineage) |
+| **`2147483543  _change_type`**                    | `string`      | The record type in the changelog (INSERT, DELETE, UPDATE_BEFORE, or UPDATE_AFTER)                           |
+| **`2147483542  _change_ordinal`**                 | `int`         | The order of the change                                                                                     |
+| **`2147483541  _commit_snapshot_id`**             | `long`        | The snapshot ID in which the change occured                                                                 |
+| **`2147483540  _row_id`**                         | `long`        | A unique long assigned when row-lineage is enabled, see [Row Lineage](#row-lineage)                                  |
+| **`2147483539  _last_updated_sequence_number`**   | `long`        | The sequence number which last updated this row when row-lineage is enabled [Row Lineage](#row-lineage)              |
 
 #### Row Lineage