include full link to docsite

Author: Rachel Prince

firebase-appdistribution/CHANGELOG.md

@@ -8,10 +8,10 @@
 * {{feature}} The Firebase App Distributio Android SDK is now available in beta. You
   can use this SDK to notify testers in-app when a new test build is available.
   To learn more, visit the
-  [reference documentation](/docs/reference/android/com/google/firebase/app-distribution/package-summary).
+  [reference documentation](https://firebase.google.com/docs/reference/android/com/google/firebase/appdistribution/package-summary).
 
 #### Kotlin extensions
 The Android library with Kotlin extensions is now available in
 beta. The Kotlin extensions library transitively includes the base
 `firebase-app-distribution` library. To learn more, visit the
-[KTX reference documentation](/docs/reference/kotlin/com/google/firebase/app-distribution/ktx/package-summary).
+[KTX reference documentation](https://firebase.google.com/docs/reference/kotlin/com/google/firebase/appdistribution/ktx/package-summary).