fix: Update frontend-platform to version 8.3.8 for fixes with theme URL loading. (#825)

8.3.7: Simplify the logic for Paragon `fallbackThemeUrl` to always rely on `window.location?.origin`;
8.3.8: Allow the creation of URLs with only `brandOverride` definition.

Author: obscherler

package-lock.json

@@ -32,7 +32,7 @@
     "@edx/brand": "npm:@openedx/brand-openedx@^1.2.2",
     "@edx/frontend-component-footer": "^14.6.0",
     "@edx/frontend-component-header": "^6.2.0",
-    "@edx/frontend-platform": "^8.3.3",
+    "@edx/frontend-platform": "^8.3.8",
     "@edx/openedx-atlas": "^0.6.0",
     "@openedx/paragon": "^23.4.5",
     "@reduxjs/toolkit": "1.9.7",