Use `libncurses6`

Dockerfile

@@ -61,7 +61,7 @@ RUN mix release
 # Lean runtime stage
 FROM ${RUNNER_IMAGE}
 RUN apt-get update && \
-    apt-get install -y libstdc++6 openssl libncurses5 locales && \
+    apt-get install -y libstdc++6 openssl libncurses6 locales && \
     apt-get clean && \
     rm -f /var/lib/apt/lists/*_*