51d module: update link (#5770)

dev-docs/modules/51DegreesRtdProvider.md

@@ -32,7 +32,7 @@ The Cloud API is **free** to integrate and use. To increase limits please check
 
 The module supports on premise and cloud device detection services with free options for both. 
 
-A free resource key for use with 51Degrees cloud service can be obtained from [51Degrees cloud configuration](https://configure.51degrees.com/HNZ75HT1).  This is the simplest approach to trial the module.
+A free resource key for use with 51Degrees cloud service can be obtained from [51Degrees cloud configuration](https://configure.51degrees.com/HNZ75HT1?utm_source=Prebid&utm_medium=Documentation).  This is the simplest approach to trial the module.
 
 An interface compatible self hosted service can be used with .NET, Java, Node, PHP, and Python.  See [51Degrees examples](https://51degrees.com/documentation/_examples__device_detection__getting_started__web__on_premise.html).
 
@@ -54,7 +54,7 @@ gulp build --modules="rtdModule,51DegreesRtdProvider,appnexusBidAdapter,..."
 
 #### Resource Key
 
-In order to use the module please first obtain a Resource Key using the [Configurator tool](https://configure.51degrees.com/HNZ75HT1) - choose the following properties:
+In order to use the module please first obtain a Resource Key using the [Configurator tool](https://configure.51degrees.com/HNZ75HT1?utm_source=Prebid&utm_medium=Documentation) - choose the following properties:
 
 * DeviceId
 * DeviceType
@@ -124,7 +124,7 @@ pbjs.setConfig({
                 waitForIt: true, // should be true, otherwise the auctionDelay will be ignored
                 params: {
                     resourceKey: '<YOUR_RESOURCE_KEY>',
-                    // Get your resource key from https://configure.51degrees.com/HNZ75HT1
+                    // Get your resource key from https://configure.51degrees.com/HNZ75HT1?utm_source=Prebid&utm_medium=Documentation
                     // alternatively, you can use the on-premise version of the 51Degrees service and connect to your chosen end point
                     // onPremiseJSUrl: 'https://localhost/51Degrees.core.js'
                 },