Title in uppercase

Co-authored-by: Sarah Hülsen <[email protected]>

Author: emanuel-schmid

doc/guide/Guide_Euler.ipynb

@@ -388,7 +388,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "### 3. configure jupyterhub\n",
+    "### 3. Configure jupyterhub\n",
     "\n",
     "create a file `~/.config/euler/jupyterhub/jupyterlabrc` with the following content:\n",
     "\n",