TST: Set new spike expected indices in test after new fixture addition

Set new spike expected indices in test after new fixture addition

Similar to commit 4926a35.

Fixes:
```
  FAILED test/test_analysis.py::test_identify_spikes - assert False
   +  where False = <function array_equal at 0x7ffa597b79b0>(
array([ 42,  48,  61,  80,  98, 103, 113, 143, 324, 387, 422, 436, 449]),
array([ 82,  83, 160, 179, 208, 219, 229, 233, 383, 389, 402, 421, 423,\n       439, 444]))
   +    where <function array_equal at 0x7ffa597b79b0> = np.array_equal
```

raised in:
https://github.com/nipreps/nifreeze/actions/runs/16485937114/job/46610541473?pr=181#step:11:918

Author: jhlegarreta

test/test_analysis.py

@@ -152,9 +152,7 @@ def test_identify_spikes(request):
     fd = rng.normal(0, 5, n_samples)
     threshold = 2.0
 
-    expected_indices = np.asarray(
-        [82, 83, 160, 179, 208, 219, 229, 233, 383, 389, 402, 421, 423, 439, 444]
-    )
+    expected_indices = np.asarray([42, 48, 61, 80, 98, 103, 113, 143, 324, 387, 422, 436, 449])
     expected_mask = np.zeros(n_samples, dtype=bool)
     expected_mask[expected_indices] = True