update notebook documentation

Author: jgbradley1

notebooks/1-Quickstart.ipynb

@@ -126,7 +126,7 @@
    "source": [
     "## Upload Files\n",
     "\n",
-    "For a demonstration of how to index data in graphrag, we first need to ingest a few files into graphrag."
+    "For a demonstration of how to index data in graphrag, we first need to ingest a few files into graphrag. **Multiple filetypes are now supported via the [MarkItDown](https://github.com/microsoft/markitdown) library.**"
    ]
   },
   {

notebooks/2-Advanced_Getting_Started.ipynb

@@ -479,7 +479,7 @@
    "source": [
     "## Upload files\n",
     "\n",
-    "Use the API to upload a collection of local files. The API will create a new storage blob container to host these files in. For a set of large files, consider reducing the batch upload size in order to not overwhelm the API endpoint and prevent out-of-memory problems."
+    "Use the API to upload a collection of files. **Multiple filetypes are now supported via the [MarkItDown](https://github.com/microsoft/markitdown) library.** The API will create a new storage blob container to host these files in. For a set of large files, consider reducing the batch upload size in order to not overwhelm the API endpoint and prevent out-of-memory problems."
    ]
   },
   {