Fix wrong jupyterlabrc file name.

Author: emanuel-schmid

doc/guide/Guide_Euler.ipynb

@@ -206,7 +206,7 @@
     "It is possible to run a Jupyter Notebook on Euler within a JupytherHub instance running as an interactive slurm job.\n",
     "See the documentation https://scicomp.ethz.ch/wiki/JupyterHub.\n",
     "\n",
-    "For using climada inside the jupyter notebook, you need to create a customized `.jupyterlabrc` file:\n",
+    "For using climada inside the jupyter notebook, you need to create a customized `jupyterlabrc` file:\n",
     "\n",
     "```bash\n",
     "cat > ~/.config/euler/jupyterhub/jupyterlabrc <<EOF\n",