Fix formulation lemma in more-algebra.tex

Thanks to Kestutis Cesnavicius

more-algebra.tex

@@ -1114,7 +1114,7 @@ \section{Fitting ideals}
 Let $R$ be a ring. Let $M$ be a finite $R$-module. Let $r \geq 0$.
 The following are equivalent
 \begin{enumerate}
-\item $M$ is finite locally free of rank $k$
+\item $M$ is finite locally free of rank $r$
 (Algebra, Definition \ref{algebra-definition-locally-free}),
 \item $\text{Fit}_{r - 1}(M) = 0$ and $\text{Fit}_r(M) = R$, and
 \item $\text{Fit}_k(M) = 0$ for $k < r$ and $\text{Fit}_k(M) = R$