fix(deps): update dependency nodebb-plugin-mentions to v4.2.0 (#11687)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

install/package.json

@@ -97,7 +97,7 @@
         "nodebb-plugin-emoji": "5.0.16",
         "nodebb-plugin-emoji-android": "4.0.0",
         "nodebb-plugin-markdown": "12.1.0",
-        "nodebb-plugin-mentions": "4.1.1",
+        "nodebb-plugin-mentions": "4.2.0",
         "nodebb-plugin-ntfy": "1.0.15",
         "nodebb-plugin-spam-be-gone": "2.1.0",
         "nodebb-rewards-essentials": "0.2.3",