fix(bench): drop esm.sh dts for object-hash to unbreak CI type-check

The object-hash bench import pulled @types/object-hash via esm.sh, whose
CommonJS `export =` (no synthetic default) makes a fresh Deno type-check
fail with TS1192 — turning main red regardless of the PR. The types aren't
used in the benchmark, so `?no-dts` drops them and keeps CI deterministic.
Verified: `deno check --reload` passes and the benchmark still runs.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: nicacioliveira

blocks/loader.bench.ts

@@ -1,4 +1,8 @@
-import hash from "https://esm.sh/v135/object-hash@3.0.0";
+// `?no-dts` skips esm.sh's bundled type definitions. Upstream `@types/object-hash`
+// uses a CommonJS `export =` with no synthetic default, which makes Deno's
+// type-check fail with TS1192 ("no default export") on a fresh fetch. The types
+// aren't needed in this benchmark, so dropping them keeps CI deterministic.
+import hash from "https://esm.sh/v135/object-hash@3.0.0?no-dts";
 
 const props = {
   randomObject: {