Expand Stylelint glob to include CSS files (#22469)

lib/assets/wordmark.dark.css

@@ -1 +1 @@
-// Not needed
+/* Not needed */

package.json

@@ -13,7 +13,7 @@
     "test": "${npm_execpath} run test:lint:js && ${npm_execpath} run test:jest",
     "test:lint": "${npm_execpath} run test:lint:js && ${npm_execpath} run test:lint:sass",
     "test:lint:js": "eslint --ext=js . --cache",
-    "test:lint:sass": "stylelint '**/*.scss';",
+    "test:lint:sass": "stylelint \"**/*.{css,scss}\";",
     "test:jest": "cross-env NODE_ENV=test jest",
     "format": "prettier --write \"**/*.{json,yml}\"",
     "format-check": "prettier --check \"**/*.{json,yml}\""

public/inert.css

@@ -3,7 +3,8 @@
   cursor: default;
 }
 
-[inert], [inert] * {
+[inert],
+[inert] * {
   user-select: none;
   -webkit-user-select: none;
   -moz-user-select: none;