Merge pull request #285 from IFCA-Advanced-Computing/fix-mnist-example

Fix MNIST example

Author: Jaime Céspedes Sisniega

docs/source/conf.py

@@ -114,7 +114,7 @@
 myst_heading_anchors = 3
 
 # MyST-NB configuration
-nb_execution_timeout = 240
+nb_execution_timeout = 480
 nb_execution_raise_on_error = True
 nb_merge_streams = True