chore: update front end dependencies

Author: jcdcdev

src/jcdcdev.Umbraco.ExtendedMarkdownEditor.Client/package-lock.json

@@ -12,9 +12,9 @@
         "lit": "^3.2.1"
     },
     "devDependencies": {
-        "@umbraco-cms/backoffice": "^15.0.0-rc2",
+        "@umbraco-cms/backoffice": "^15.0.0-rc3",
         "typescript": "^5.6.3",
-        "vite": "^5.4.9"
+        "vite": "^5.4.11"
     },
     "volta": {
         "node": "20.18.0"