Bump postcss from 8.4.38 to 8.4.47

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.38 to 8.4.47.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.38...8.4.47)

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

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

package.json

@@ -16,7 +16,7 @@
     "gulp-sourcemaps": "^3.0.0",
     "gulp-uglify-es": "^3.0.0",
     "merge-stream": "^2.0.0",
-    "postcss": "^8.4.38",
+    "postcss": "^8.4.47",
     "sass": "^1.77.8"
   },
   "scripts": {