docs: typos fixed (#26234)

While going through the chatbot tutorial, I noticed a couple of typos
and grammatical issues. Also, the pip install command for
langchain_community was commented out, but the document mentions
installing it.

---------

Co-authored-by: Erick Friis <[email protected]>

docs/docs/tutorials/chatbot.ipynb

@@ -105,7 +105,7 @@
     "\n",
     "## Quickstart\n",
     "\n",
-    "First up, let's learn how to use a language model by itself. LangChain supports many different language models that you can use interchangably - select the one you want to use below!\n",
+    "First up, let's learn how to use a language model by itself. LangChain supports many different language models that you can use interchangeably - select the one you want to use below!\n",
     "\n",
     "```{=mdx}\n",
     "import ChatModelTabs from \"@theme/ChatModelTabs\";\n",
@@ -254,7 +254,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# ! pip install langchain_community"
+    "%pip install langchain_community"
    ]
   },
   {
@@ -952,7 +952,7 @@
    "source": [
     "## Streaming\n",
     "\n",
-    "Now we've got a function chatbot. However, one *really* important UX consideration for chatbot application is streaming. LLMs can sometimes take a while to respond, and so in order to improve the user experience one thing that most application do is stream back each token as it is generated. This allows the user to see progress.\n",
+    "Now we've got a functioning chatbot. However, one *really* important UX consideration for chatbot applications is streaming. LLMs can sometimes take a while to respond, and so in order to improve the user experience one thing that most applications do is stream back each token as it is generated. This allows the user to see progress.\n",
     "\n",
     "It's actually super easy to do this!\n",
     "\n",