[examples] update the name of pollution example.

...utputs_PostProcessing_calib/totalsobol_Deflection [m].csv

examples/pollusion/__init__.py

examples/pollusion/data/MeasuredData.npy

examples/pollusion/data/ParamSets.npy

examples/pollusion/data/mean.npy

examples/pollusion/data/refBME_KLD.npy

examples/pollusion/data/std.npy

examples/pollusion/data/validLikelihoods.npy

examples/pollusion/data/validSet.npy

examples/pollusion/data/validSetOutput.npy

examples/pollusion/pollution.py

examples/pollusion/test_pollution.py