Added: docs Headers to Steam Tool notebook steps (#14749)

Added some Headers in steam tool notebook to match consistency with the
other toolkit notebooks
  - Dependencies: no new dependencies
  - Tag maintainer: @hwchase17, @baskaryan

---------

Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>

docs/docs/integrations/toolkits/steam.ipynb

@@ -14,11 +14,20 @@
     "- `Game Details`\n",
     "- `Recommended Games`\n",
     "\n",
+    "This notebook provides a walkthrough of using Steam API with LangChain to retrieve Steam game recommendations based on your current Steam Game Inventory or to gather information regarding some Steam Games which you provide.\n",
+    "\n",
     "## Setting up\n",
     "\n",
     "We have to install two python libraries."
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Imports"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -32,7 +41,9 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Then we have to get the `STEAM_KEY` and `STEAM_ID` from [Steam](https://store.steampowered.com/about/) site."
+    "## Assign Environmental Variables\n",
+    "To use this toolkit, please have your OpenAI API Key, Steam API key (from [here](https://steamcommunity.com/dev/apikey)) and your own SteamID handy. Once you have received a Steam API Key, you can input it as an environmental variable below.\n",
+    "The toolkit will read the \"STEAM_KEY\" API Key as an environmental variable to authenticate you so please set them here. You will also need to set your \"OPENAI_API_KEY\" and your \"STEAM_ID\"."
    ]
   },
   {
@@ -52,6 +63,8 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
+    "## Initialization: \n",
+    "Initialize the LLM, SteamWebAPIWrapper, SteamToolkit and most importantly the langchain agent to process your query!\n",
     "## Example"
    ]
   },