Rebuild loongarch ubuntu image (#1311)

Author: am11

src/azurelinux/3.0/net10.0/cross/loongarch64/Dockerfile

@@ -3,6 +3,9 @@ ARG ROOTFS_DIR=/crossrootfs/loongarch64
 FROM mcr.microsoft.com/dotnet-buildtools/prereqs:azurelinux-3.0-net10.0-crossdeps-builder-amd64 AS builder
 ARG ROOTFS_DIR
 
+# temporarily bypass cache to fetch the latest arcade version with recent fixes
+RUN rm -rf /scripts && git clone --depth 1 --single-branch https://github.com/dotnet/arcade /scripts
+
 RUN rootfsEnv="/usr/local/share/rootfs" && \
     python3 -m venv "$rootfsEnv" && \
     "$rootfsEnv/bin/python" -m pip install aiohttp zstandard && \