build(deps-dev): bump the postcss group with 1 update

Bumps the postcss group with 1 update: [postcss](https://github.com/postcss/postcss).

- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.28...8.4.29)

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

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

package.json

@@ -16,7 +16,7 @@
     "css-loader": "^6.8.1",
     "esbuild-loader": "^4.0.2",
     "mini-css-extract-plugin": "^2.7.6",
-    "postcss": "^8.4.28",
+    "postcss": "^8.4.29",
     "postcss-loader": "^7.3.3",
     "postcss-scss": "^4.0.7",
     "prettier": "^3.0.3",

yarn.lock

@@ -3098,7 +3098,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss@npm:^8.3.11, postcss@npm:^8.4.21, postcss@npm:^8.4.27, postcss@npm:^8.4.28":
+"postcss@npm:^8.3.11, postcss@npm:^8.4.21, postcss@npm:^8.4.27":
   version: 8.4.28
   resolution: "postcss@npm:8.4.28"
   dependencies:
@@ -3109,6 +3109,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"postcss@npm:^8.4.29":
+  version: 8.4.29
+  resolution: "postcss@npm:8.4.29"
+  dependencies:
+    nanoid: ^3.3.6
+    picocolors: ^1.0.0
+    source-map-js: ^1.0.2
+  checksum: dd6daa25e781db9ae5b651d9b7bfde0ec6e60e86a37da69a18eb4773d5ddd51e28fc4ff054fbdc04636a31462e6bf09a1e50986f69ac52b10d46b7457cd36d12
+  languageName: node
+  linkType: hard
+
 "prettier@npm:^3.0.3":
   version: 3.0.3
   resolution: "prettier@npm:3.0.3"
@@ -3987,7 +3998,7 @@ __metadata:
     css-loader: ^6.8.1
     esbuild-loader: ^4.0.2
     mini-css-extract-plugin: ^2.7.6
-    postcss: ^8.4.28
+    postcss: ^8.4.29
     postcss-loader: ^7.3.3
     postcss-scss: ^4.0.7
     prettier: ^3.0.3