fix: upgrade @umbraco-cms/backoffice from 16.3.3 to 16.3.4

Snyk has created this PR to upgrade @umbraco-cms/backoffice from 16.3.3 to 16.3.4.

See this package in npm:
@umbraco-cms/backoffice

See this project in Snyk:
https://app.snyk.io/org/jcdcdev/project/3d466729-9b2e-402f-ab33-ae586fe880c8?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

src/Umbraco.Community.BackOfficeOrganiser.Client/package-lock.json

@@ -11,7 +11,7 @@
 	},
 	"devDependencies": {
 		"lit": "^3.3.1",
-		"@umbraco-cms/backoffice": "^16.3.3",
+		"@umbraco-cms/backoffice": "^16.3.4",
 		"typescript": "^5.9.3",
 		"vite": "^7.1.12"
 	},