Cleaned up API KEY placeholder text

end-to-end-use-cases/agents/Agents_Tutorial/Tool_Calling_101.ipynb

@@ -71,7 +71,7 @@
     "import os\n",
     "from groq import Groq\n",
     "# Create the Groq client\n",
-    "client = Groq(api_key='gsk_PDfGP611i_HAHAHAHA_THIS_IS_NOT_MY_REAL_KEY_PLEASE_REPLACE')"
+    "client = Groq(api_key='YOUR_API_KEY')"
    ]
   },
   {

end-to-end-use-cases/agents/Agents_Tutorial/Tool_Calling_201.ipynb

@@ -87,9 +87,9 @@
     "from groq import Groq\n",
     "\n",
     "# Create the Groq client\n",
-    "client = Groq(api_key='gsk_PDfGP611i_HAHAHAHA_THIS_IS_NOT_MY_REAL_KEY_PLEASE_REPLACE')\n",
+    "client = Groq(api_key='YOUR_API_KEY')\n",
     "\n",
-    "tavily_client = TavilyClient(api_key='fake_key_HAHAHAHA_THIS_IS_NOT_MY_REAL_KEY_PLEASE_REPLACE')\n"
+    "tavily_client = TavilyClient(api_key='YOUR_API_KEY')\n"
    ]
   },
   {