Update image link

Author: Zhi Zhou

notebooks/build_person_directory.ipynb

@@ -19,7 +19,7 @@
     "\n",
     "| Enrollment | Searching |\n",
     "| :-: | :-: |\n",
-    "| ![PD_enrollment.png](../data/face/PD_enrollment.png) | ![PD_searching.png](../data/face/PD_searching.png) |"
+    "| ![PD_enrollment.png](https://media.githubusercontent.com/media/Azure-Samples/azure-ai-content-understanding-python/refs/heads/zhizho/face/data/face/PD_enrollment.png) | ![PD_searching.png](https://media.githubusercontent.com/media/Azure-Samples/azure-ai-content-understanding-python/refs/heads/zhizho/face/data/face/PD_searching.png) |"
    ]
   },
   {
@@ -121,7 +121,8 @@
    "id": "6a5a058c",
    "metadata": {},
    "source": [
-    "### Identifying persons\n"
+    "### Identifying person\n",
+    "Detect multiple faces in an image and identify each one by matching it against enrolled persons in a Person Directory."
    ]
   },
   {
@@ -144,7 +145,7 @@
     "            name = person.get(\"tags\", {}).get(\"name\", \"Unknown\")\n",
     "            print(f\"Detected person: {name} with confidence: {person.get('confidence', 0)} at bounding box: {face['boundingBox']}\")\n",
     "\n",
-    "print(\"Done\")\n"
+    "print(\"Done\")"
    ]
   },
   {