fix ref to cartopy tutorial

Tutorials/Apply_function_to_every_gridpoint.ipynb

@@ -4568,7 +4568,7 @@
    "id": "437d4d93-c95a-4606-a483-c5409ac37619",
    "metadata": {},
    "source": [
-    "Plot the calculated slope, stippling all regions that are significant at $p<0.05$. Before we plot we need to load the unmasked coordinates and attach them to the dataarray otherwise regions neal the poles will be distorted (see )."
+    "Plot the calculated slope, stippling all regions that are significant at $p<0.05$. Before we plot we need to load the unmasked coordinates and attach them to the dataarray otherwise regions near the poles are distorted (see the [Making_Maps_with_Cartopy](https://cosima-recipes.readthedocs.io/en/latest/Tutorials/Making_Maps_with_Cartopy.html#Fixing-the-tripole) tutorial)."
    ]
   },
   {