Polish correction.

src/measure/measurable-maps/metric.tex

@@ -53,7 +53,7 @@
 \label{proposition:metric-measurable-limit}
     Let $(X, \cm)$ be a measurable space, $Y$ be a metrisable topological space, and $\seq{f_n}$ be $(\cm, \cb_Y)$-measurable functions, then:
     \begin{enumerate}
-        \item If $Y$ is completely metrisable, then $\bracsn{\limv{n}f_n \text{ exists}} \in \cm$.
+        \item If $Y$ is Polish, then $\bracsn{\limv{n}f_n \text{ exists}} \in \cm$.
         \item If $f = \limv{n}f_n$ exists, then it is $(\cm, \cb_Y)$-measurable.
     \end{enumerate}
 \end{proposition}