Bump postcss from 8.4.25 to 8.4.31 in /Extension/manifest_v3

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: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Extension/manifest_v3/package-lock.json

@@ -4581,9 +4581,9 @@
             }
         },
         "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",