fix: Mark toolchain as reproducible

Author: mortenmj

jq/toolchain/platforms.bzl

@@ -74,6 +74,12 @@ jq_toolchain(name = "jq_toolchain", bin = "{0}", visibility = ["//visibility:pub
     # Base BUILD file for this repository
     rctx.file("BUILD.bazel", build_content)
 
+    # Bazel <8.3.0 lacks rctx.repo_metadata
+    if not hasattr(rctx, "repo_metadata"):
+        return None
+
+    return rctx.repo_metadata(reproducible = True)
+
 jq_platform_repo = repository_rule(
     implementation = _jq_platform_repo_impl,
     doc = "Fetch external tools needed for jq toolchain",