Typo in posterior distribution over weights in Bayesian linear regression

[lvulpius]

There is a typo in the equation for the posterior mean of the weights in the document "regression_bayesian.ipynb":

$\mathbf{\mu}_{\mathbf{w} | \mathbf{y}, \mathbf{X} } = (\sigma^{-2}\boldsymbol{\Phi}^\top \boldsymbol{\Phi} + \lambda \mathbf{I})\boldsymbol{\Phi}^\top \mathbf{y}$,

$\sigma^{-2}$ should not appear in the equation.