Fix an index

Thanks to Rachel Webb
https://stacks.math.columbia.edu/tag/0D70#comment-6284

spaces-simplicial.tex

@@ -992,7 +992,7 @@ \section{Augmentations of simplicial sites}
 a_{0, *}\mathcal{F}_0 \to
 a_{0, *}f_{\varphi, *} f_\varphi^{-1}\mathcal{F}_0
 \xrightarrow{\mathcal{F}(\varphi)}
-a_{0, *}f_{\varphi, *} \mathcal{F}_0 = a_{1, *}\mathcal{F}_1
+a_{0, *}f_{\varphi, *} \mathcal{F}_1 = a_{1, *}\mathcal{F}_1
 $$
 where the first arrow comes from $1 \to f_{\varphi, *} f_\varphi^{-1}$.
 Let $\mathcal{G}_\bullet$ denote the constant simplicial sheaf