treewide: bump bazel to 8.3.1
This also bumps bazel_skylib, as it uses deprecated functionality.
Change-Id: I26d665967c14e5b3a437a3322f065ae1e2e63d9e
Reviewed-on: https://review.monogon.dev/c/monogon/+/4383
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>
diff --git a/.bazelrc.sandboxroot b/.bazelrc.sandboxroot
index dcefa26..6b0ffa1 100644
--- a/.bazelrc.sandboxroot
+++ b/.bazelrc.sandboxroot
@@ -10,7 +10,7 @@
# No host CC platform - we only want pure Go for the sandboxroot
build --host_platform=@io_bazel_rules_go//go/toolchain:linux_amd64
-common --experimental_downloader_config=build/bazel/bazel_downloader.cfg
+common --downloader_config=build/bazel/bazel_downloader.cfg
# Shared with main .bazelrc
try-import %workspace%/.bazelrc.user