fix: update frontend-build to fix install issues (#1553)

Earlier versions of @openedx/frontend-build used on older version of
'sharp', which caused intermittent installation issues. The version of
'sharp' was updated in @openedx/frontend-build to fix these issues, so
the frontend-build version can be updated here, to fix the issues in
this project too. See
https://github.com/openedx/frontend-build/issues/664 and
https://github.com/openedx/frontend-build/pull/665 for more information.

The frontend-build dependency was updated by:

```
npm install --package-lock-only @openedx/frontend-build
```

Private-ref: https://tasks.opencraft.com/browse/BB-9953

package-lock.json

@@ -49,7 +49,7 @@
       "devDependencies": {
         "@edx/browserslist-config": "^1.1.1",
         "@edx/reactifex": "1.1.0",
-        "@openedx/frontend-build": "^14.6.1",
+        "@openedx/frontend-build": "^14.6.2",
         "babel-plugin-formatjs": "10.5.39",
         "eslint-plugin-import": "2.32.0",
         "glob": "7.2.3",

package.json

@@ -69,7 +69,7 @@
   "devDependencies": {
     "@edx/browserslist-config": "^1.1.1",
     "@edx/reactifex": "1.1.0",
-    "@openedx/frontend-build": "^14.6.1",
+    "@openedx/frontend-build": "^14.6.2",
     "babel-plugin-formatjs": "10.5.39",
     "eslint-plugin-import": "2.32.0",
     "glob": "7.2.3",