chore(deps): update dependency @edx/frontend-build to v12.8.40

Author: renovate[bot]

package-lock.json

@@ -34,7 +34,7 @@
   "devDependencies": {
     "@edx/brand": "npm:@edx/[email protected]",
     "@edx/browserslist-config": "1.2.0",
-    "@edx/frontend-build": "12.8.38",
+    "@edx/frontend-build": "12.8.40",
     "@edx/paragon": "^20.30.1",
     "@testing-library/react-hooks": "^8.0.1",
     "axios-mock-adapter": "^1.21.3",