Bump broccoli-static-site-json from 3.3.2 to 3.4.0

Bumps [broccoli-static-site-json](https://github.com/empress/broccoli-static-site-json) from 3.3.2 to 3.4.0.
- [Release notes](https://github.com/empress/broccoli-static-site-json/releases)
- [Changelog](https://github.com/empress/broccoli-static-site-json/blob/master/CHANGELOG.md)
- [Commits](empress/broccoli-static-site-json@v3.3.2...v3.4.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -23,7 +23,7 @@
     "@ember/optional-features": "^1.3.0",
     "algoliasearch": "^3.35.1",
     "broccoli-asset-rev": "^3.0.0",
-    "broccoli-static-site-json": "^3.3.2",
+    "broccoli-static-site-json": "^3.4.0",
     "ember-ajax": "^5.0.0",
     "ember-auto-import": "^1.3.0",
     "ember-cli": "~3.12.0",