Rebase (but LLVM-21.1.0-rc2-woa64.exe hasn't been synced)

Author: reneleonhardt

src/ci/docker/scripts/versions.sh

@@ -4,4 +4,4 @@
 # To keep docker / non-docker builds in sync
 
 # renovate: datasource=github-releases depName=llvm/llvm-project versioning=semver-coerced extractVersion=^llvmorg-(?<version>\d+\.\d+\.\d+(?:.*))
-export LLVM_VERSION=20.1.3
+export LLVM_VERSION=21.1.0-rc2