chore: use the fixture for the doc benchmarks

tests/benchmarks/test_bench_doc.py

@@ -1,7 +1,5 @@
 """Benches from the CodSpeed Getting Started Documentation."""
 
-import pytest
-
 
 def count_even_fast(arr):
     """Count the number of even numbers in an array."""
@@ -12,16 +10,14 @@ def count_even_fast(arr):
     return even
 
 
-@pytest.mark.benchmark
-def test_count_even_fast():
-    assert count_even_fast(range(10_000)) == 5000
+def test_count_even_fast(benchmark):
+    assert benchmark(count_even_fast, range(10_000)) == 5000
 
 
 def count_even_slow(arr):
     """Count the number of even numbers in an array."""
     return sum(1 for x in arr if x % 2 == 0)
 
 
-@pytest.mark.benchmark
-def test_count_even_slow():
-    assert count_even_slow(range(10_000)) == 5000
+def test_count_even_slow(benchmark):
+    assert benchmark(count_even_slow, range(10_000)) == 5000