Bump postcss from 8.4.1 to 8.4.4 in /build/javascript (#1565)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.1 to 8.4.4.
- [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/8.4.1...8.4.4)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build/javascript/package-lock.json

@@ -1206,9 +1206,9 @@
       }
     },
     "postcss": {
-      "version": "8.4.1",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.1.tgz",
-      "integrity": "sha512-WqLs/TTzXdG+/A4ZOOK9WDZiikrRaiA+eoEb/jz2DT9KUhMNHgP7yKPO8vwi62ZCsb703Gwb7BMZwDzI54Y2Ag==",
+      "version": "8.4.4",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.4.tgz",
+      "integrity": "sha512-joU6fBsN6EIer28Lj6GDFoC/5yOZzLCfn0zHAn/MYXI7aPt4m4hK5KC5ovEZXy+lnCjmYIbQWngvju2ddyEr8Q==",
       "dev": true,
       "requires": {
         "nanoid": "^3.1.30",

build/javascript/package.json

@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "cssnano": "^5.0.11",
-    "postcss": "^8.4.1",
+    "postcss": "^8.4.4",
     "postcss-cli": "^9.0.2"
   },
   "snowpack": {