Pin pytest below 9.2 until pytest-benchmark is fixed (#1248)

pytest 9.2 removed Node._nodeid, which pytest-benchmark 5.3.0 still
reads, so test_benchmark_text_string_to_metric_families errors at setup.
The fix (ionelmc/pytest-benchmark#323) is merged but not yet released.

Assisted-by: Claude Sonnet 5.5

Signed-off-by: Chris Marchbanks <csmarchbanks@gmail.com>

Author: csmarchbanks

tox.ini

@@ -5,7 +5,10 @@ envlist = coverage-clean,py{3.10,3.11,3.12,3.13,3.14,py3.10,3.10-nooptionals},co
 deps =
     asgiref
     coverage
-    pytest
+    # pytest 9.2 removed Node._nodeid, which pytest-benchmark 5.3.0 still reads:
+    # https://github.com/ionelmc/pytest-benchmark/issues/321
+    # Drop the upper bound once a pytest-benchmark release includes the fix.
+    pytest<9.2
     pytest-benchmark
     attrs
     {py3.10,pypy3.10}: twisted