Bump postcss from 8.3.6 to 8.4.4

Bumps [postcss](https://github.com/postcss/postcss) from 8.3.6 to 8.4.4.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.3.6...8.4.4)

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

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

Author: dependabot[bot]

package-lock.json

@@ -41,7 +41,7 @@
     "classnames": "2.3.1",
     "eslint": "7.32.0",
     "eslint-config-next": "11.1.2",
-    "postcss": "8.3.6",
+    "postcss": "8.4.4",
     "postcss-100vh-fix": "1.0.2",
     "postcss-flexbugs-fixes": "5.0.2",
     "postcss-hover-media-feature": "1.0.1",