fix(deps): update dependency nodebb-theme-persona to v11.2.21 (#9969)

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

install/package.json

@@ -93,7 +93,7 @@
         "nodebb-plugin-spam-be-gone": "0.7.10",
         "nodebb-rewards-essentials": "0.2.0",
         "nodebb-theme-lavender": "5.2.1",
-        "nodebb-theme-persona": "11.2.20",
+        "nodebb-theme-persona": "11.2.21",
         "nodebb-theme-slick": "1.4.14",
         "nodebb-theme-vanilla": "12.1.8",
         "nodebb-widget-essentials": "5.0.4",