Merge pull request #2595 from devitocodes/JDBetteridge/dispersion_notebook

examples: Dispersion relation preserving notebook

Author: mloubout

examples/seismic/tutorials/07.1_dispersion_relation.ipynb

@@ -6,4 +6,5 @@ nbval<0.11.1
 scipy<1.15.4
 pooch<1.8.3
 click<9.0
-cloudpickle<3.1.2
+cloudpickle<3.1.2
+ipympl<0.9.8