fix(docs): fix variable name in t_robust_kernel.ipynb (#7407)

Author: Varia7

docs/jupyter/t_pipelines/t_robust_kernel.ipynb

@@ -281,7 +281,7 @@
     "\n",
     "s = time.time()\n",
     "\n",
-    "reg_point_to_plane = treg.icp(source, target, max_correspondence_distance,\n",
+    "reg_point_to_plane = treg.icp(source_noisy, target, max_correspondence_distance,\n",
     "                              init_source_to_target, estimation, criteria,\n",
     "                              voxel_size)\n",
     "\n",
@@ -326,7 +326,7 @@
     "\n",
     "s = time.time()\n",
     "\n",
-    "reg_point_to_plane = treg.icp(source, target, max_correspondence_distance,\n",
+    "reg_point_to_plane = treg.icp(source_noisy, target, max_correspondence_distance,\n",
     "                              init_source_to_target, estimation, criteria,\n",
     "                              voxel_size)\n",
     "\n",