Fix map

Thanks to Owen Barrett
https://stacks.math.columbia.edu/tag/0997#comment-6118

algebraization.tex

@@ -1215,7 +1215,7 @@ \section{Derived completion on a ringed site}
 \to \mathcal{O}_f \to 0
 $$
 where the first map sends a local section $(x_0, x_1, \ldots)$ to
-$(fx_0 - x_1, fx_1 - x_2, \ldots)$ and the second map sends
+$(x_0, x_1 - fx_0, x_2 - fx_1, \ldots)$ and the second map sends
 $(x_0, x_1, \ldots)$ to $x_0 + x_1/f + x_2/f^2 + \ldots$.
 Applying $\SheafHom_\mathcal{O}(-, \mathcal{I}^\bullet)$
 where $\mathcal{I}^\bullet$ is a K-injective complex of $\mathcal{O}$-modules