fix(deps): bump postcss from 8.4.4 to 8.4.5 (#438)

Author: dependabot[bot]

package-lock.json

@@ -36,7 +36,7 @@
     "express": "^4.17.1",
     "find-cache-dir": "^3.3.2",
     "next": "11.1.3",
-    "postcss": "^8.4.4",
+    "postcss": "^8.4.5",
     "react": "17.0.2",
     "react-dom": "17.0.2",
     "sass": "^1.44.0",