Update dependency autoprefixer to v10.4.20

Author: renovate[bot]

package-lock.json

@@ -21,7 +21,7 @@
     "xterm-addon-web-links": "0.9.0"
   },
   "devDependencies": {
-    "autoprefixer": "10.4.19",
+    "autoprefixer": "10.4.20",
     "copy-webpack-plugin": "12.0.2",
     "css-loader": "7.1.2",
     "html-webpack-plugin": "5.6.0",