Merge pull request #231 from jenkinsci/dependabot/npm_and_yarn/autoprefixer-10.4.15

Bump autoprefixer from 10.4.14 to 10.4.15

Author: uhafner

package.json

@@ -10,7 +10,7 @@
     "@popperjs/core": "2.11.8"
   },
   "devDependencies": {
-    "autoprefixer": "10.4.14",
+    "autoprefixer": "10.4.15",
     "cross-env": "7.0.3",
     "rtlcss": "4.1.0",
     "node-sass": "9.0.0",