Fix link to ERA5 notebook in HRES T0 notebook

docs/example_hres_t0.ipynb

@@ -87,7 +87,7 @@
    "source": [
     "## Downloading Static Variables from ERA5 Data\n",
     "\n",
-    "The static variables are not available in WeatherBench2, so we need to download them from ERA5, just like we did [in the example for ERA5](example_era5#downloading-the-data).\n",
+    "The static variables are not available in WeatherBench2, so we need to download them from ERA5, just like we did [in the example for ERA5](example_era5.ipynb#downloading-the-data).\n",
     "To do so, register an account with the [Climate Data Store](https://cds.climate.copernicus.eu/) and create `$HOME/.cdsapirc` with the following content:\n",
     "\n",
     "```\n",