Bug 1719519 - Add DoH Nightly Normandy slug to the graduation set to transition clients over to remote settings. r=mythmon

Differential Revision: https://phabricator.services.mozilla.com/D119311

toolkit/components/normandy/lib/PreferenceRollouts.jsm

@@ -133,6 +133,7 @@ var PreferenceRollouts = {
   GRADUATION_SET: new Set([
     "pref-webrender-intel-rollout-70-release",
     "bug-1703186-rollout-http3-support-release-88-89",
+    "rollout-doh-nightly-rollout-to-all-us-desktop-users-nightly-74-80-bug-1613481",
   ]),
 
   /**