Update dependency autoprefixer from 10.4.19 to v10.4.20 (docs/package.json) (#10672)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

docs/package-lock.json

@@ -1,7 +1,7 @@
 {
   "devDependencies": {
     "postcss": "8.4.40",
-    "autoprefixer": "10.4.19",
+    "autoprefixer": "10.4.20",
     "postcss-cli": "11.0.0"
   }
 }