docs: Quote example ids in Swagger

server/api/controllers/base-custom-field-groups/create.js

@@ -18,7 +18,7 @@
  *         description: ID of the project to create the base custom field group in
  *         schema:
  *           type: string
- *           example: 1357158568008091264
+ *           example: "1357158568008091264"
  *     requestBody:
  *       required: true
  *       content:

server/api/controllers/base-custom-field-groups/delete.js

@@ -18,7 +18,7 @@
  *         description: ID of the base custom field group to delete
  *         schema:
  *           type: string
- *           example: 1357158568008091264
+ *           example: "1357158568008091264"
  *     responses:
  *       200:
  *         description: Base custom field group deleted successfully

server/api/controllers/base-custom-field-groups/update.js

@@ -18,7 +18,7 @@
  *         description: ID of the base custom field group to update
  *         schema:
  *           type: string
- *           example: 1357158568008091264
+ *           example: "1357158568008091264"
  *     requestBody:
  *       required: true
  *       content: