docs: minor spelling errors (#18429)

Description: Noticed spelling errors. 'Colab' mispelt as 'Collab'.
https://python.langchain.com/docs/use_cases
Dependencies: n/a

docs/docs/use_cases/code_understanding.ipynb

@@ -13,7 +13,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "[![Open In Collab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/langchain-ai/langchain/blob/master/docs/docs/use_cases/code_understanding.ipynb)\n",
+    "[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/langchain-ai/langchain/blob/master/docs/docs/use_cases/code_understanding.ipynb)\n",
     "\n",
     "## Use case\n",
     "\n",

docs/docs/use_cases/extraction.ipynb

@@ -15,7 +15,7 @@
    "id": "b84edb4e",
    "metadata": {},
    "source": [
-    "[![Open In Collab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/langchain-ai/langchain/blob/master/docs/docs/use_cases/extraction.ipynb)\n",
+    "[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/langchain-ai/langchain/blob/master/docs/docs/use_cases/extraction.ipynb)\n",
     "\n",
     "## Use case\n",
     "\n",

docs/docs/use_cases/web_scraping.ipynb

@@ -15,7 +15,7 @@
    "id": "6605e7f7",
    "metadata": {},
    "source": [
-    "[![Open In Collab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/langchain-ai/langchain/blob/master/docs/docs/use_cases/web_scraping.ipynb)\n",
+    "[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/langchain-ai/langchain/blob/master/docs/docs/use_cases/web_scraping.ipynb)\n",
     "\n",
     "## Use case\n",
     "\n",