[examples][model-comparison] update the reference.

examples/model-comparison/reference/confusionMatrix_ND_1.svg

...ples/model-comparison/reference/confusionMatrix_ND_11.svg

...ples/model-comparison/reference/confusionMatrix_ND_13.svg

...ples/model-comparison/reference/confusionMatrix_ND_15.svg

examples/model-comparison/reference/confusionMatrix_ND_3.svg

examples/model-comparison/reference/confusionMatrix_ND_5.svg

examples/model-comparison/reference/confusionMatrix_ND_7.svg

examples/model-comparison/reference/confusionMatrix_ND_9.svg

...s/model-comparison/reference/modelWeights_Observation.svg

examples/model-comparison/reference/modelWeights_cosine.svg

...s/model-comparison/reference/modelWeights_exponential.svg

examples/model-comparison/reference/modelWeights_linear.svg

examples/model-comparison/reference/model_weights_ref.pkl