Enable require-unicode-regexp and regexp/strict rule (#16408)

website/static/landing.js

@@ -23,7 +23,7 @@ window.addEventListener("load", () => {
   logoWrapper.addEventListener("dragstart", handleLogoDrag);
 
   lastDash.addEventListener("animationend", (event) => {
-    if (/roll/.test(event.animationName)) {
+    if (/roll/u.test(event.animationName)) {
       logo.classList.remove("rolling");
     }
   });

website/static/service-worker.js

@@ -53,4 +53,4 @@ toolbox.router.default = toolbox.networkFirst;
 
 // For scripts, stylesheets and images, we can use the "fastest" strategy
 // This means you need to reload twice to get new changes
-toolbox.router.get(/\.(js|css|png|svg)$/, toolbox.fastest);
+toolbox.router.get(/\.(js|css|png|svg)$/u, toolbox.fastest);