Update dependency @rails/webpacker to v5.4.3

Author: renovate-bot

package.json

@@ -10,7 +10,7 @@
     "@rails/activestorage": "6.1.4",
     "@rails/ujs": "6.1.4",
     "@fontsource/poppins": "4.5.0",
-    "@rails/webpacker": "5.4.0",
+    "@rails/webpacker": "5.4.3",
     "@rjsf/bootstrap-4": "3.0.0",
     "@rjsf/core": "2.5.1",
     "babel-plugin-transform-react-remove-prop-types": "0.4.24",