Added migrations to change Ghost Explore integration type

no issue

- The previous integration type is insufficient and we need to utilise a new type `core`

ghost/core/core/server/data/migrations/versions/5.9/2022-08-09-08-32-added-new-integration-type.js

@@ -0,0 +1,24 @@
+const logging = require('@tryghost/logging');
+const {createTransactionalMigration} = require('../../utils');
+
+module.exports = createTransactionalMigration(
+    async function up(knex) {
+        logging.info('Changing Ghost Explore Integration to type "core"');
+        await knex('integrations')
+            .where({
+                name: 'Ghost Explore',
+                slug: 'ghost-explore'
+            })
+            .update('type', 'core');
+    },
+    async function down(knex) {
+        logging.info('Changing Ghost Explore Integration to type "builtin"');
+
+        await knex('integrations')
+            .where({
+                name: 'Ghost Explore',
+                slug: 'ghost-explore'
+            })
+            .update('type', 'builtin');
+    }
+);