2markdown loader (#4796)

Co-authored-by: Eugene Yurtsev <eyurtsev@gmail.com>

docs/modules/indexes/document_loaders/examples/html.ipynb

@@ -90,7 +90,6 @@
    "execution_count": 2,
    "id": "4be99e6c",
    "metadata": {
-    "collapsed": false,
     "jupyter": {
      "outputs_hidden": false
     },
@@ -131,7 +130,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.6"
+   "version": "3.9.1"
   }
  },
  "nbformat": 4,