fix 1444 PR comment

* mistake made with schema update, a new migration should be added, not current ones renamed
* the `down` portion reverts this value to schema 004

db/migration/1721137710002-UpdateSchemaForChartConfigChange.ts

@@ -0,0 +1,19 @@
+import { MigrationInterface, QueryRunner } from "typeorm"
+
+export class UpdateSchemaForChartConfigChange
+    implements MigrationInterface
+{
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`-- sql
+            UPDATE charts
+            SET config = JSON_SET(config, '$.$schema', 'https://files.ourworldindata.org/schemas/grapher-schema.005.json');
+        `)
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`-- sql
+            UPDATE charts
+            SET config = JSON_SET(config, '$.$schema', 'https://files.ourworldindata.org/schemas/grapher-schema.004.json');
+        `)
+    }
+}