Update precip-freq.ipynb

Author: jukent

notebooks/example-workflows/precip-freq.ipynb

@@ -36,8 +36,8 @@
     "\n",
     "| Concepts | Importance | Notes |\n",
     "| --- | --- | --- |\n",
-    "| [Intro to Xarray](https://foundations.projectpythia.org/core/xarray/xarray-intro.html) | Necessary | |\n",
-    "| [Understanding of NetCDF](https://foundations.projectpythia.org/core/data-formats/netcdf-cf.html) | Helpful | Familiarity with metadata structure |\n",
+    "| [Intro to Xarray](https://foundations.projectpythia.org/core/xarray/xarray-intro) | Necessary | |\n",
+    "| [Understanding of NetCDF](https://foundations.projectpythia.org/core/data-formats/netcdf-cf) | Helpful | Familiarity with metadata structure |\n",
     "| Dask | Helpful | |\n",
     "\n",
     "- **Time to learn**: 5 minutes"