OptidigitalBidAdapter: Adding userId module, updating User Sync infor…

…mation (#4858)

* update optidigital documentation

* update optidigital documentation

---------

Co-authored-by: Dawid W <dawid@optidigital.fr>

dev-docs/bidders/optidigital.md

@@ -12,6 +12,7 @@ schain_supported: true
 ortb_blocking_supported: true
 safeframes_ok: true
 media_types: banner
+userIds: all
 gvl_id: 915
 sidebarType: 1
 ---
@@ -37,7 +38,7 @@ The following test parameters can be used to verify that the Optidigital adapter
 
 ### AdUnits configuration example
 
-```
+```js
     var adUnits = [{
       code: 'your-slot_1-div', // use exactly the same code as your slot div id.
       mediaTypes: {
@@ -62,13 +63,19 @@ The following test parameters can be used to verify that the Optidigital adapter
 ```
 
 ### UserSync example
+To optimize UserSync functionality and ensure optimal match rates and monetization with the Optidigital adapter, we strongly advise implementing the UserSync configuration through iFrame as provided below. Failure to do so may result in reduced match rates and monetization capabilities.
 
-```
+```js
 pbjs.setConfig({
-  userSync: {
-    iframeEnabled: true,
-    syncEnabled: true,
-    syncDelay: 3000
-  }
+  userSync: {
+    filterSettings: {
+      iframe: {
+        bidders: '*', // '*' represents all bidders
+        filter: 'include'
+      }
+    }
+  }
 });
 ```
+
+Note: be aware that when using this configuration, you can combine it with other UserSync configurations as needed. Keep in mind that if you make multiple `setConfig()` calls, the last one for a specific attribute will take precedence and overwrite any previous configurations.