benchmarks: bump aca-model pin to c31b5dd

Picks up the consumption_unequiv rename + regenerated benchmark
snapshot. No other pylcm changes.

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

Author: hmgaudecker

pixi.lock

@@ -98,7 +98,7 @@ tests-cuda13 = { features = [ "tests", "cuda13" ], solve-group = "cuda13" }
 tests-metal = { features = [ "tests", "metal" ], solve-group = "metal" }
 type-checking = { features = [ "type-checking", "tests" ], solve-group = "default" }
 [tool.pixi.feature.benchmarks.pypi-dependencies]
-aca-model = { git = "https://github.com/OpenSourceEconomics/aca-model.git", rev = "d9339ab1a00861b2d8f4b5c3f70aa216b9cbd0a6" }
+aca-model = { git = "https://github.com/OpenSourceEconomics/aca-model.git", rev = "c31b5dd81701d99a1d5efc64a959dee5ac26432b" }
 [tool.pixi.feature.cuda12]
 platforms = [ "linux-64" ]
 system-requirements = { cuda = "12" }