chore(deps): update dependency postcss to v8.4.39 (#1322)

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

Author: renovate[bot]

package.json

@@ -134,7 +134,7 @@
     "jest": "29.7.0",
     "jest-environment-jsdom": "29.7.0",
     "nock": "13.5.4",
-    "postcss": "8.4.38",
+    "postcss": "8.4.39",
     "postcss-loader": "8.1.1",
     "rimraf": "5.0.7",
     "style-loader": "4.0.0",