test(plan): add command_item_index to windows fixture query snapshots

The `command_item_index` field was added to `ExecutionCacheKey::UserTask`
for the array-shorthand work but the windows-gated fixture's
`query_dev_in_subpackage.jsonc` and `query_dev_filter_from_root.jsonc`
were missed (the `task_graph.jsonc` already got updated in the prior
commit). CI on Windows catches it.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: wan9chi

crates/vite_task_plan/tests/plan_snapshots/fixtures/windows_cmd_shim_rewrite/snapshots/query_dev_filter_from_root.jsonc

@@ -54,6 +54,7 @@
                     "execution_cache_key": {
                       "UserTask": {
                         "task_name": "dev",
+                        "command_item_index": 0,
                         "and_item_index": 0,
                         "extra_args": [],
                         "package_path": "packages/foo"

crates/vite_task_plan/tests/plan_snapshots/fixtures/windows_cmd_shim_rewrite/snapshots/query_dev_in_subpackage.jsonc

@@ -54,6 +54,7 @@
                     "execution_cache_key": {
                       "UserTask": {
                         "task_name": "dev",
+                        "command_item_index": 0,
                         "and_item_index": 0,
                         "extra_args": [],
                         "package_path": "packages/foo"