Update Gleam version in prod

Author: lpil

Dockerfile

@@ -1,5 +1,5 @@
 FROM erlang:27.1.1.0-alpine AS build
-COPY --from=ghcr.io/gleam-lang/gleam:v1.5.1-erlang-alpine /bin/gleam /bin/gleam
+COPY --from=ghcr.io/gleam-lang/gleam:v1.6.2-erlang-alpine /bin/gleam /bin/gleam
 COPY . /app/
 RUN cd /app && gleam export erlang-shipment