Fix run-p script glob on yarn 2+

Yarn 2+ expands glob patterns using its own shell and fails the `lint` script.

Quote the pattern to prevent premature expansion. Escaped double quotes are used
for compatibility with cmd.exe.

Related-Bug: mysticatea/npm-run-all#200 yarnpkg/berry#1814

website/package.json

@@ -10,7 +10,7 @@
     "rsync:export": "rsync -avu --delete-after dist-timetable/",
     "promote-staging": "bash scripts/promote-staging.sh",
     "typecheck": "tsc --noEmit",
-    "lint": "run-p lint:**",
+    "lint": "run-p \"lint:**\"",
     "lint:code": "eslint --ext .js,.ts,.tsx api scripts src webpack",
     "lint:styles": "stylelint \"src/**/*.scss\" --syntax scss",
     "test": "jest --coverage",