chore: update presubmit.yml (#293)

Turn off Windows testing. It's red on BCR. We don't publish windows
binaries for our Rust tools yet.

Upstreaming
bazelbuild/bazel-central-registry@9a64dd6

.bcr/presubmit.yml

@@ -2,7 +2,8 @@ bcr_test_module:
   module_path: "e2e/smoke"
   matrix:
     bazel: ["7.x", "6.x"]
-    platform: ["debian10", "macos", "ubuntu2004", "windows"]
+    # TODO(#9): add windows to this list
+    platform: ["debian10", "macos", "ubuntu2004"]
   tasks:
     run_tests:
       name: "Run test module"