Fix a bad link in notebook (#307)

* Fix a bad link in notebook

* tweak wordings

---------

Co-authored-by: Yazhou Cao <cyz19892002@gmail.com>

examples/notebooks/counting_cans.ipynb

@@ -1348,7 +1348,7 @@
    "source": [
     "### Step 3 - Inspect the result\n",
     "\n",
-    "The output of the `generate_code` method is a [`CodeContext`](https://github.com/landing-ai/vision-agent/blob/main/vision_agent/agent/agent_utils.py#L33-L37) object, which contains the generated code, a test case, a success flag, and the result of the test case.\n",
+    "The output of the `generate_code` method is a [CodeContext](https://github.com/landing-ai/vision-agent/blob/main/vision_agent/agent/agent_utils.py#L33-L37) object, which contains the generated code, a test case, a success flag, and the result of the test case.\n",
     "\n",
     "\n",
     "```python\n",
@@ -1581,7 +1581,9 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Write a test case for the code above."
+    "Write a test case for the code above.\n",
+    "\n",
+    "| Tip: to get started with a simple test case, you can reference the `test` field from the response object, i.e. `response.test`."
    ]
   },
   {
@@ -1967,7 +1969,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Let's try another image"
+    "The result looks good. Let's try another image."
    ]
   },
   {
@@ -2286,7 +2288,7 @@
     "\n",
     "The Inventory percentage from the above result should be 100% but it's showing 68.6%. This is because the generated code harded coded the maximum capacity of the inventory to 35 cans.\n",
     "\n",
-    "Let's update the generated code to allow passing in the maximum capacity as a parameter.\n"
+    "Let's update the generated code to allow passing maximum capacity as a parameter.\n"
    ]
   },
   {
@@ -2669,7 +2671,7 @@
    "source": [
     "## Next Steps\n",
     "\n",
-    "- Try the VisionAgent web app at [visionagent.ai](https://visionagent.ai)\n",
+    "- Try the VisionAgent web app at [va.landing.ai](https://va.landing.ai)\n",
     "- Learn more about the VisionAgent ecosystem in [this blog](https://landing.ai/blog/introducing-visionagent-your-visual-ai-pilot)\n",
     "- Check out the open source repo at [github.com/landing-ai/vision-agent](https://github.com/landing-ai/vision-agent)"
    ]