Update dependency postcss-loader to v8.2.0 (#1458)

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

Author: renovate[bot]

package-lock.json

@@ -45,7 +45,7 @@
     "less": "4.4.1",
     "less-loader": "12.3.0",
     "node-sass": "9.0.0",
-    "postcss-loader": "8.1.1",
+    "postcss-loader": "8.2.0",
     "rimraf": "6.0.1",
     "sass-loader": "16.0.5",
     "style-loader": "4.0.0",