move postcss-nesting to dependencies

Author: rafh

package-lock.json

@@ -42,6 +42,7 @@
     "pdfobject": "2.3.0",
     "postcss": "8.4.35",
     "postcss-loader": "8.1.1",
+    "postcss-nesting": "12.1.0",
     "pretty-ms": "9.0.0",
     "sortablejs": "1.15.2",
     "swagger-ui-dist": "5.11.8",
@@ -86,7 +87,6 @@
     "jsdom": "24.0.0",
     "markdownlint-cli": "0.39.0",
     "postcss-html": "1.6.0",
-    "postcss-nesting": "12.1.0",
     "stylelint": "16.2.1",
     "stylelint-declaration-block-no-ignored-properties": "2.8.0",
     "stylelint-declaration-strict-value": "1.10.4",