build(deps-dev): bump @tailwindcss/postcss from 4.1.18 to 4.2.1 (#175)

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packages/browser-ext/package.json

@@ -76,7 +76,7 @@
   "devDependencies": {
     "@testing-library/dom": "^10.4.0",
     "@crxjs/vite-plugin": "^2.3.0",
-    "@tailwindcss/postcss": "^4.1.18",
+    "@tailwindcss/postcss": "^4.2.1",
     "@testing-library/jest-dom": "^6.9.1",
     "@testing-library/react": "^16.3.2",
     "@types/chrome": "0.1.32",