correct tag var use

test-model-card-template-dreambooth-sdxl-lora-adv.ipynb

@@ -144,7 +144,7 @@
     "        \"stable-diffusion-xl-diffusers\",\n",
     "        \"text-to-image\",\n",
     "        \"diffusers\",\n",
-    "        \"lora\",\n",
+    "        lora,\n",
     "        \"template:sd-lora\",\n",
     "    ]\n",
     "    model_card = populate_model_card(model_card, tags=tags)\n",