Docs: fix naming typo (#3532)

docs/use_cases/agent_simulations/two_player_dnd.ipynb

@@ -215,10 +215,11 @@
    ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Protagonist and dungeon master system messages"
+    "## Protagonist and storyteller system messages"
    ]
   },
   {
@@ -253,10 +254,11 @@
    ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Create AI assistant agent and AI user agent"
+    "## Initialize the protagonist and storyteller"
    ]
   },
   {