Merge pull request #1303 from finos/renovate/postcss-8.x

chore(deps): update dependency postcss to v8.5.3

Author: oliviajanejohns

calm-hub-ui/package.json

@@ -68,7 +68,7 @@
         "css-what": "6.1.0",
         "express": "4.21.2",
         "nth-check": "2.1.1",
-        "postcss": "8.5.1",
+        "postcss": "8.5.3",
         "rollup": "4.40.2"
     },
     "proxy": "http://127.0.0.1:8080/",