add typos.toml config and fix typos

notes_reed-solomon.tex

@@ -155,7 +155,7 @@ Furthermore, in our use case in the context of FRI IOP, we are not interested in
 Let $g(x)$ be the generator polynomial
 $$g(x) = (x-\alpha) (x-\alpha^2) \cdots (x-\alpha^{2s-1})$$
 
-whith $\alpha$ being a primitive element of $GF(p^r)$.
+with $\alpha$ being a primitive element of $GF(p^r)$.
 
 The \emph{encoder} wants to map the message $\{ m_0, m_1, \ldots, m_{k-1} \}$ into a polynomial $p(x)$ of degree $<k$ such that