Bump postcss from 8.4.18 to 8.4.19 (#6555)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.18 to 8.4.19.
- [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/8.4.18...8.4.19)

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

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

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

package.json

@@ -404,7 +404,7 @@
     "node-loader": "^2.0.0",
     "nodemon": "^2.0.20",
     "playwright": "^1.27.1",
-    "postcss": "^8.4.18",
+    "postcss": "^8.4.19",
     "postcss-loader": "^6.2.1",
     "query-string": "^7.1.1",
     "randomcolor": "^0.6.2",

yarn.lock

@@ -10082,10 +10082,10 @@ postcss@^6.0.14, postcss@^6.0.2:
     source-map "^0.6.1"
     supports-color "^5.4.0"
 
-postcss@^8.3.0, postcss@^8.4.18, postcss@^8.4.7:
-  version "8.4.18"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.18.tgz#6d50046ea7d3d66a85e0e782074e7203bc7fbca2"
-  integrity sha512-Wi8mWhncLJm11GATDaQKobXSNEYGUHeQLiQqDFG1qQ5UTDPTEvKw0Xt5NsTpktGTwLps3ByrWsBrG0rB8YQ9oA==
+postcss@^8.3.0, postcss@^8.4.18, postcss@^8.4.19, postcss@^8.4.7:
+  version "8.4.19"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.19.tgz#61178e2add236b17351897c8bcc0b4c8ecab56fc"
+  integrity sha512-h+pbPsyhlYj6N2ozBmHhHrs9DzGmbaarbLvWipMRO7RLS+v4onj26MPFXA5OBYFxyqYhUJK456SwDcY9H2/zsA==
   dependencies:
     nanoid "^3.3.4"
     picocolors "^1.0.0"