fix(docker): add wine32 to enable 32-bit Wine support for winetricks

winetricks vcrun2019 invokes syswow64/regedit.exe (32-bit PE) which
requires wine32; without it Wine returns c0000135 (STATUS_DLL_NOT_FOUND).
i386 architecture is already added so wine32 installs cleanly

contrib/windows/Dockerfile

@@ -6,7 +6,7 @@ ENV WINEDEBUG=-all
 # System dependencies + Wine + Xvfb
 RUN dpkg --add-architecture i386 && \
     apt-get update && apt-get install -y --no-install-recommends \
-    wine wine64 \
+    wine wine32 wine64 \
     python3 python3-pip python3-venv libpython3.11 \
     binutils wget xvfb xauth cabextract ca-certificates \
     && rm -rf /var/lib/apt/lists/*