Bump postcss from 8.4.6 to 8.4.7

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.6 to 8.4.7.
- [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/8.4.6...8.4.7)

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

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

yarn.lock

@@ -3806,10 +3806,10 @@ multicast-dns@^6.0.1:
     dns-packet "^1.3.1"
     thunky "^1.0.2"
 
-nanoid@^3.2.0:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.2.0.tgz#62667522da6673971cca916a6d3eff3f415ff80c"
-  integrity sha512-fmsZYa9lpn69Ad5eDn7FMcnnSR+8R34W9qJEijxYhTbfOWzr22n1QxCMzXLK+ODyW2973V3Fux959iQoUxzUIA==
+nanoid@^3.3.1:
+  version "3.3.1"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.1.tgz#6347a18cac88af88f58af0b3594b723d5e99bb35"
+  integrity sha512-n6Vs/3KGyxPQd6uO0eH4Bv0ojGSUvuLlIHtC3Y0kEO23YRge8H9x1GCzLn28YX0H66pMkxuaeESFq4tKISKwdw==
 
 negotiator@0.6.3:
   version "0.6.3"
@@ -4402,11 +4402,11 @@ postcss-value-parser@^4.0.2, postcss-value-parser@^4.1.0, postcss-value-parser@^
   integrity sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==
 
 postcss@^8.1.10, postcss@^8.2.15, postcss@^8.4:
-  version "8.4.6"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.6.tgz#c5ff3c3c457a23864f32cb45ac9b741498a09ae1"
-  integrity sha512-OovjwIzs9Te46vlEx7+uXB0PLijpwjXGKXjVGGPIGubGpq7uh5Xgf6D6FiJ/SzJMBosHDp6a2hiXOS97iBXcaA==
+  version "8.4.7"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.7.tgz#f99862069ec4541de386bf57f5660a6c7a0875a8"
+  integrity sha512-L9Ye3r6hkkCeOETQX6iOaWZgjp3LL6Lpqm6EtgbKrgqGGteRMNb9vzBfRL96YOSu8o7x3MfIH9Mo5cPJFGrW6A==
   dependencies:
-    nanoid "^3.2.0"
+    nanoid "^3.3.1"
     picocolors "^1.0.0"
     source-map-js "^1.0.2"