Yandex ID System page (prebid#5268)

* feat: add yandex id system docs

* fix: add yandex id to adapters table

* fix: update docs on how to add user id module

* fix: adjust list type

* Add storage config

dev-docs/modules/userId.md

@@ -259,6 +259,7 @@ Bidders that want to support the User ID module in Prebid.js need to update thei
 | ConnectID | Yahoo | connectId | yahoo.com | {"connectId": "72d04af6..."} |
 | FreePass ID | FreePass | freepassId | | "1111" |
 | UtiqMtp ID | Utiq | utiqMtpId | utiq-mtp.com | "1111" |
+| Yandex ID | Yandex | yandexId | yandex.com | "11111111111111111" |
 
 For example, the adapter code might do something like:
 
@@ -344,7 +345,11 @@ If you're an ID provider that wants to get on this page:
 * Add your *IdSystem name into the modules/.submodules.json file
 * Follow all the guidelines in the [contribution page](https://github.com/prebid/Prebid.js/blob/master/CONTRIBUTING.md).
 * Submit a Pull Request against the [Prebid.js repository](https://github.com/prebid/Prebid.js).
-* Fork the prebid.org [documentation repository](https://github.com/prebid/prebid.github.io), modify /dev-docs/modules/userId.md, /download.md, and submit a documentation Pull Request.
+* Update the Prebid docs
+  * Fork the prebid.org [documentation repository](https://github.com/prebid/prebid.github.io)
+  * Add `/dev-docs/modules/userid-submodules/<userIdModuleName>.md`
+  * Add a new row to `/dev-docs/modules/userId.md#prebidjs-adapters`
+  * Submit a documentation Pull Request
 
 <a name="getUserIds"></a>
 

dev-docs/modules/userid-submodules/yandex.md

@@ -0,0 +1,37 @@
+---
+layout: userid
+title: Yandex ID
+description: Yandex User ID sub-module
+useridmodule: yandexIdSystem
+---
+
+Yandex ID module is designed to improve the personalization of ads for publishers' users. This documentation provides information about the Yandex User ID module, and instructions to install it. 
+
+## Step 1. Add Yandex ID to Prebid.js package
+
+Add the module to your Prebid.js package:
+
+{: .alert.alert-info :}
+gulp build --modules=yandexIdSystem
+
+## Step 2. Enable Yandex ID
+
+Include the following call to `setConfig` in your Prebid.js code:
+
+```javascript
+pbjs.setConfig({
+    userSync: {
+        userIds: [
+            {
+                name: 'yandex',
+                bidders: ['yandex'],
+                storage: {
+                    type: 'cookie',
+                    name: '_ym_uid',
+                    expires: 365,
+                },
+            },
+        ],
+    },
+});
+```