Merge pull request #294 from huili77/main

update exercise 3 init data archive

Author: huili77

notebooks/modifications/xml/exercises/xml_timestep_exercise.ipynb

@@ -93,7 +93,7 @@
     "    \n",
     "```\n",
     "    ./case.setup\n",
-    "    cp /glade/campaign/cesm/tutorial/tutorial_2023_archive/b1850.initial/rest/0002-01-01-00000/*   /glade/derecho/scratch/$USER/b1850.timestep/run/\n",
+    "    cp /glade/campaign/cesm/tutorial/tutorial_2025_archive/b1850.initial/rest/0002-01-01-00000/*   /glade/derecho/scratch/$USER/b1850.timestep/run/\n",
     "```\n",
     "    \n",
     "\n",