chore(deps): bump postcss from 8.4.25 to 8.4.31 in /docs

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.25 to 8.4.31.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.4.25...8.4.31)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

docs/package-lock.json

@@ -28,7 +28,7 @@
         "medium-zoom": "^1.0.8",
         "node-fetch": "^3.3.1",
         "path-browserify": "^1.0.1",
-        "postcss": "^8.4.24",
+        "postcss": "^8.4.31",
         "prism-react-renderer": "^1.3.5",
         "react": "^17.0.2",
         "react-dom": "^17.0.2",
@@ -13956,9 +13956,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.4.25",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.25.tgz",
-      "integrity": "sha512-7taJ/8t2av0Z+sQEvNzCkpDynl0tX3uJMCODi6nT3PfASC7dYCWV9aQ+uiCf+KBD4SEFcu+GvJdGdwzQ6OSjCw==",
+      "version": "8.4.31",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.31.tgz",
+      "integrity": "sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ==",
       "funding": [
         {
           "type": "opencollective",

docs/package.json

@@ -34,7 +34,7 @@
     "medium-zoom": "^1.0.8",
     "node-fetch": "^3.3.1",
     "path-browserify": "^1.0.1",
-    "postcss": "^8.4.24",
+    "postcss": "^8.4.31",
     "prism-react-renderer": "^1.3.5",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",