fix: bump postcss from 8.3.9 to 8.3.11

Bumps [postcss](https://github.com/postcss/postcss) from 8.3.9 to 8.3.11.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.3.9...8.3.11)

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

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

package.json

@@ -36,7 +36,7 @@
     "hosted-git-info": "4.0.2",
     "normalize-url": "7.0.2",
     "path-parse": "1.0.7",
-    "postcss": "8.3.9",
+    "postcss": "8.3.11",
     "trim-newlines": "4.0.2"
   },
   "devDependencies": {