Fix missing bar

Thanks to Noah Olander
https://stacks.math.columbia.edu/tag/03RR#comment-4982

etale-cohomology.tex

@@ -10734,7 +10734,7 @@ \section{Picard groups of curves}
 Write $X = \bar X - \{ x_1, \ldots, x_r\}$. Then $\Pic(X) =
 \Pic(\bar X)/ R$, where $R$ is the subgroup generated by
 $\mathcal{O}_{\bar X}(x_i)$, $1 \leq i \leq r$. Since $r \geq 1$, we see that
-$\Pic^0(X) \to \Pic(X)$ is surjective, hence $\Pic(X)$ is
+$\Pic^0(\bar X) \to \Pic(X)$ is surjective, hence $\Pic(X)$ is
 divisible. Applying the Kummer sequence, we get (1) and (3). For (2), recall
 that
 \begin{align*}