Temporarily disable macOS x86_64 cross-compile target

Deno 2.6.x has a regression bug that causes cross-compilation to
x86_64-apple-darwin to fail with "No such file or directory" error.
Other cross-compile targets (Linux ARM64, macOS ARM64, Windows) work
correctly.

denoland/deno#31664 (comment)

Author: dahlia

packages/cli/scripts/pack.ts

@@ -11,7 +11,9 @@ const triplets: Record<OS, Partial<Record<Arch, string>>> = {
     aarch64: "aarch64-unknown-linux-gnu",
   },
   macos: {
-    x86_64: "x86_64-apple-darwin",
+    // TODO: Temporarily disabled due to Deno cross-compile bug:
+    // https://github.com/denoland/deno/issues/31664#issuecomment-3706946901
+    // x86_64: "x86_64-apple-darwin",
     aarch64: "aarch64-apple-darwin",
   },
   windows: {