OptmizationTolerance public trainer API options misspelling

[daholste]

Should be "Optim" instead of "Optm". Misspelling occurs on the public API for some trainers, like

machinelearning/src/Microsoft.ML.StandardTrainers/Standard/LogisticRegression/LbfgsPredictorBase.cs

Line 54 in b6c5b70

public float OptmizationTolerance = Defaults.OptimizationTolerance;