Add TestTag to the Recovery key field.

libraries/testtags/src/main/kotlin/io/element/android/libraries/testtags/TestTags.kt

@@ -33,6 +33,11 @@ object TestTags {
     val loginPassword = TestTag("login-password")
     val loginContinue = TestTag("login-continue")
 
+    /**
+     * Verification screen.
+     */
+    val recoveryKey = TestTag("verification-recovery_key")
+
     /**
      * Sign out screen.
      */