ci-builder: Bump nightly rust version to be 1.83.0 compatible

def- · def- · commit 71f38969dd53 · 2025-01-02T15:54:52.000Z
Follow-up to MaterializeInc#30872 Noticed in https://buildkite.com/materialize/deploy/builds/17226#019427a7-9f03-4ce4-bac9-16c6ab9a3bff
diff --git a/bin/ci-builder b/bin/ci-builder
@@ -16,7 +16,7 @@
 
 set -euo pipefail
 
-NIGHTLY_RUST_DATE=2024-08-01
+NIGHTLY_RUST_DATE=2024-12-02
 
 cd "$(dirname "$0")/.."
 
