clarify resolution in cam exercise

Author: cecilehannay

notebooks/challenge/cam/exercise_1.ipynb

@@ -45,8 +45,8 @@
     "\n",
     "**What is the resolution for F2000climo?**\n",
     "\n",
-    "- Use resolution: f09_f09_mg17\n",
-    "\n",
+    "- Supported resolution for this compset is: ``f09_f09_mg17`` (i.e. 1 degree)\n",
+    "- During the tutorial, we recommend to use : ``f19_f19_mg17`` (i.e. 2 degree) because it will be faster.\n",
     "\n",
     "</details>\n",
     "</div>\n"
@@ -255,7 +255,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.12"
+   "version": "3.10.13"
   }
  },
  "nbformat": 4,