add docs to min_chunk_size (#12537)

Minor addition to documentation to elaborate on min_chunk_size.

Co-authored-by: Kenzie Mihardja <kenzie@docugami.com>

docs/docs/integrations/document_loaders/docugami.ipynb

@@ -64,7 +64,9 @@
    "source": [
     "## Load Documents\n",
     "\n",
-    "If the DOCUGAMI_API_KEY environment variable is set, there is no need to pass it in to the loader explicitly otherwise you can pass it in as the `access_token` parameter."
+    "If the DOCUGAMI_API_KEY environment variable is set, there is no need to pass it in to the loader explicitly otherwise you can pass it in as the `access_token` parameter.\n",
+    "\n",
+    "The DocugamiLoader has a default minimum chunk size of 32. Chunks smaller than that are appended to subsequent chunks. Set min_chunk_size to 0 to get all structural chunks regardless of size."
    ]
   },
   {