fix(deps): update dependency nodebb-theme-harmony to v1.0.15 (#11565)

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

install/package.json

@@ -100,7 +100,7 @@
         "nodebb-plugin-ntfy": "1.0.15",
         "nodebb-plugin-spam-be-gone": "2.0.7",
         "nodebb-rewards-essentials": "0.2.3",
-        "nodebb-theme-harmony": "1.0.14",
+        "nodebb-theme-harmony": "1.0.15",
         "nodebb-theme-lavender": "7.0.9",
         "nodebb-theme-peace": "2.0.21",
         "nodebb-theme-persona": "13.0.60",