fix(deps): update dependency nodebb-theme-lavender to v5.0.15 (#9053)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

install/package.json

@@ -102,7 +102,7 @@
         "nodebb-plugin-soundpack-default": "1.0.0",
         "nodebb-plugin-spam-be-gone": "0.7.7",
         "nodebb-rewards-essentials": "0.1.4",
-        "nodebb-theme-lavender": "5.0.14",
+        "nodebb-theme-lavender": "5.0.15",
         "nodebb-theme-persona": "10.3.0",
         "nodebb-theme-slick": "1.3.5",
         "nodebb-theme-vanilla": "11.3.8",