Bump postcss-loader from 4.2.0 to 4.3.0 in /docs (primer#1685)

Bumps [postcss-loader](https://github.com/webpack-contrib/postcss-loader) from 4.2.0 to 4.3.0.
- [Release notes](https://github.com/webpack-contrib/postcss-loader/releases)
- [Changelog](https://github.com/webpack-contrib/postcss-loader/blob/v4.3.0/CHANGELOG.md)
- [Commits](webpack-contrib/postcss-loader@v4.2.0...v4.3.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

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

docs/package.json

@@ -32,7 +32,7 @@
     "postcss": "8.3.9",
     "postcss-import": "14.0.2",
     "postcss-load-config": "3.1.0",
-    "postcss-loader": "4.2.0",
+    "postcss-loader": "4.3.0",
     "postcss-scss": "4.0.1",
     "postcss-simple-vars": "6.0.3",
     "prop-types": "^15.7.2",

docs/yarn.lock

@@ -14338,10 +14338,10 @@ postcss-load-config@^2.0.0:
     cosmiconfig "^5.0.0"
     import-cwd "^2.0.0"
 
-[email protected]:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-4.2.0.tgz#f6993ea3e0f46600fb3ee49bbd010448123a7db4"
-  integrity sha512-mqgScxHqbiz1yxbnNcPdKYo/6aVt+XExURmEbQlviFVWogDbM4AJ0A/B+ZBpYsJrTRxKw7HyRazg9x0Q9SWwLA==
+postcss-loader@4.3.0, postcss-loader@^4.2.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-4.3.0.tgz#2c4de9657cd4f07af5ab42bd60a673004da1b8cc"
+  integrity sha512-M/dSoIiNDOo8Rk0mUqoj4kpGq91gcxCfb9PoyZVdZ76/AuhxylHDYZblNE8o+EQ9AMSASeMFEKxZf5aU6wlx1Q==
   dependencies:
     cosmiconfig "^7.0.0"
     klona "^2.0.4"
@@ -14359,17 +14359,6 @@ postcss-loader@^3.0.0:
     postcss-load-config "^2.0.0"
     schema-utils "^1.0.0"
 
-postcss-loader@^4.2.0:
-  version "4.3.0"
-  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-4.3.0.tgz#2c4de9657cd4f07af5ab42bd60a673004da1b8cc"
-  integrity sha512-M/dSoIiNDOo8Rk0mUqoj4kpGq91gcxCfb9PoyZVdZ76/AuhxylHDYZblNE8o+EQ9AMSASeMFEKxZf5aU6wlx1Q==
-  dependencies:
-    cosmiconfig "^7.0.0"
-    klona "^2.0.4"
-    loader-utils "^2.0.0"
-    schema-utils "^3.0.0"
-    semver "^7.3.4"
-
 postcss-merge-longhand@^4.0.11:
   version "4.0.11"
   resolved "https://registry.yarnpkg.com/postcss-merge-longhand/-/postcss-merge-longhand-4.0.11.tgz#62f49a13e4a0ee04e7b98f42bb16062ca2549e24"