update gems, sorbet

.devcontainer/Dockerfile.devcontainer

@@ -9,7 +9,6 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --mount=type=cache,target=/var/lib/apt,sharing=locked \
     apt-get update && \
     apt-get install --no-install-recommends --no-install-suggests -qqy \
-    libicu-dev \
     abiword \
     autoconf \
     build-essential \
@@ -17,6 +16,7 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     curl \
     ffmpeg \
     ffmpegthumbnailer \
+    file \
     gnupg \
     iputils-ping \
     libblas-dev \
@@ -25,6 +25,7 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     libgdbm-dev \
     libgdbm6 \
     libgmp-dev \
+    libicu-dev \
     liblapack-dev \
     libncurses5-dev \
     libpq-dev \