Fix typo in docs Nerfology/Model components/Ray samplers (#1553)

fixed typo

docs/nerfology/model_components/visualize_samplers.ipynb

@@ -1,6 +1,7 @@
 {
     "cells": [
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+            "attachments": {},
             "cell_type": "markdown",
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             "source": [
@@ -46,7 +47,7 @@
                 ":class: only-dark\n",
                 "```\n",
                 "\n",
-                "### Heirarchical Sampling\n",
+                "### Hierarchical Sampling\n",
                 "\n",
                 "It is important to sample the scene where it has content otherwise the reconstruction quality will be reduced. \n",
                 "\n",
@@ -7413,7 +7414,7 @@
     ],
     "metadata": {
         "kernelspec": {
-            "display_name": "Python 3.8.12 ('nerfactory')",
+            "display_name": "Python 3",
             "language": "python",
             "name": "python3"
         },
@@ -7427,11 +7428,11 @@
             "name": "python",
             "nbconvert_exporter": "python",
             "pygments_lexer": "ipython3",
-            "version": "3.8.12"
+            "version": "3.10.7"
         },
         "vscode": {
             "interpreter": {
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+                "hash": "916dbcbb3f70747c44a77c7bcd40155683ae19c65e1c03b4aa3499c5328201f1"
             }
         }
     },