Update operator_custom_with_taichi.ipynb

docs/tutorial_advanced/operator_custom_with_taichi.ipynb

@@ -18,7 +18,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Brain dynamics is sparse and event-driven, however, proprietary operators for brain dynamics are not well abstracted and summarized. As a result, we are often faced with the need to customize operators. In this tutorial, we will explore how to customize brain dynamics operators using ti.\n",
+    "Brain dynamics is sparse and event-driven, however, proprietary operators for brain dynamics are not well abstracted and summarized. As a result, we are often faced with the need to customize operators. In this tutorial, we will explore how to customize brain dynamics operators using taichi.\n",
     "\n",
     "Start by importing the relevant Python package."
    ]