Add new bid adaptor alias (#2450)

dev-docs/bidders/MobfoxX.md

@@ -0,0 +1,20 @@
+---
+layout: bidder
+title: Mobfox X
+description: Mobfox X Bidder Adaptor
+biddercode: MobfoxX
+pbjs: true
+media_types: banner, video
+gdpr_supported: true
+schain_supported: true
+usp_supported: true
+userIds: id5Id, unifiedId
+aliasCode: gamoshi
+---
+
+### Bid params
+
+{: .table .table-bordered .table-striped }
+| Name              | Scope    | Description                                                   | Example              | Type     |
+|-------------------|----------|---------------------------------------------------------------|----------------------|----------|
+| `supplyPartnerId` | required | ID of the supply partner | `'12345'`            | `string` |