fix: use fork of scratch-storage

This fork overrides the `output.publicPath` option to fix asset URLs.

See https://github.com/RaspberryPiFoundation/scratch-storage for more details.

Co-authored-by: Chris Lowis <chris.lowis@gofreerange.com>

Author: sebjacobs

package-lock.json

@@ -114,7 +114,7 @@
     "scratch-l10n": "5.0.280",
     "scratch-paint": "3.0.303",
     "scratch-render-fonts": "1.0.206",
-    "scratch-storage": "4.0.170",
+    "scratch-storage": "npm:@RaspberryPiFoundation/scratch-storage@0.1.0-experience-cs.20250701103408",
     "startaudiocontext": "1.2.1",
     "style-loader": "4.0.0",
     "to-style": "1.3.3",