Bump postcss from 8.5.5 to 8.5.6 in /with-tailwindcss-app

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.5 to 8.5.6.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.5...8.5.6)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

with-tailwindcss-app/package.json

@@ -37,7 +37,7 @@
     "@types/react-dom": "18.3.1",
     "@types/shortid": "^2.2.0",
     "dotenv": "^16.5.0",
-    "postcss": "^8.5.5",
+    "postcss": "^8.5.6",
     "prettier": "3.x",
     "tailwindcss": "^4.1.10",
     "typescript": "^5.8.3"

with-tailwindcss-app/yarn.lock

@@ -3784,10 +3784,10 @@ postcss@8.4.31:
     picocolors "^1.0.0"
     source-map-js "^1.0.2"
 
-postcss@^8.4.41, postcss@^8.5.5:
-  version "8.5.5"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.5.tgz#04de7797f6911fb1c96550e96616d08681537ef3"
-  integrity sha512-d/jtm+rdNT8tpXuHY5MMtcbJFBkhXE6593XVR9UoGCH8jSFGci7jGvMGH5RYd5PBJW+00NZQt6gf7CbagJCrhg==
+postcss@^8.4.41, postcss@^8.5.6:
+  version "8.5.6"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.6.tgz#2825006615a619b4f62a9e7426cc120b349a8f3c"
+  integrity sha512-3Ybi1tAuwAP9s0r1UQ2J4n5Y0G05bJkpUIO0/bI9MhwmD70S5aTWbXGBwxHrelT+XM1k6dM0pk+SwNkpTRN7Pg==
   dependencies:
     nanoid "^3.3.11"
     picocolors "^1.1.1"